1Classification of Animals

📚
GRADES OF BODY ORGANIZATION/ LEVELS OF  MAN BODY ORGANIZATION
Image 1
1 / 2
Image 1
Fig.Acellular grade of body
organization in Amoeba proteus

Table 1: Grade of organization 1 what is there man. Is it working nice nos


Protoplasmic / Molecular / Acellular gradeCellular grade
Tissue grade
Organ grade
Organ system grade
Characteristics
All life activities occur within a single cell
  1. Loose association or aggregation of cells
  2. Slight division of labour
  1. Forms definite tissue structures
  2. Tissue = group of similar cells performing a specific function
  3. Nerve net: nerve cells and processes form a definite tissue
  4. Next
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  1. Different tissues organized into organs
  2. Each organ specialized for a function
  3. Organs: Eye spots, Proboscis, Reproductive organs
Organs form systems specialized for specific body functions
Examples
Protozoa and other unicellular organisms
Porifera
Cnidarians
Platyhelminthes
Nemathelminthes to Chordata
Q1.
Tissue grade of organisation occurs in which of the following animals.
📚
GERM LAYERS
Image 1
Category
Diploblastic Animals
Triploblastic Animals
Layers
  1. Ectoderm
  2. Endoderm
  1. Ectoderm
  2. Mesoderm
  3. Endoderm
Formation

Cells of either ectoderm,
or more usually, the endoderm
give rise to a third germ
layer, the mesoderm.
Examples
Protozoa to Coelenterata
Platyhelminthes to Chordata
Q1.
How many germ layers are found in a sponge?
📚
BODY CAVITY/ COELOM
Image 1
Category
Acoelomates
Pseudocoelomates / Blastocoelomates
Eucoelomates
Description
Animals without coelom or body cavity
  1. Cavities not entirely lined by peritoneum.
  2. Called blastocoel which may be a persistent blastocoel or derived from vacuoles within cells.
Cavities bounded on all sides by mesodermal peritoneum.
Examples
  1. Coelenteron in Coelenterata
  2. In Platyhelminthes, the region between the ectodermal epidermis and the endodermal digestive tract is completely filled with mesoderm in the form of a spongy mass of space filling cells called Parenchyma.
Nemathelminthes
Annelida to Chordata
Image 1
Subtype
Schizocoelous
Enterocoelous
Characteristics / Formation
  1. Schizocoelom arises from mesodermal split.
  2. This body cavity is formed from blocks of mesoderm around the gut that enlarge and hollow out.
  3. All the schizocoelomates are protostomains.
  1. Enterocoelom arises from outpocketing of the embryonic gut (endoderm).
  2. It is formed by outpocketings of the primitive gut that break off and form the coelom.
  3. All the enterocoelomates are deuterostomes.
Examples
  1. Annelida
  2. Arthopoda
  3. Mollusca
  1. Echinodermata
  2. Hemichordata
  3. Chordata
Haemocoelomates
Image 1
◉ Description: Coelom filled with blood is called Haemocoel.
◉ Examples:
  1. Arthopoda
  2. Mollusca
Q1.
Coelom derived from blastocoel is known as
📅BPKIHS 2008
Q2.
Haemocoel is present in
📅MOE 2064
Q3.
All triploblastic animals are
Q4.
An enterocoelomate invertebrate group is
Image 1
Fig.Illustration of blind sac body plan
📚
ANIMAL BODY PLANS
Body Plan Type
Cell aggregate body plan
Blind sac body plan
Tube within a tube body plan
Characteristics
  1. Cells are loosely aggregated
  2. Intracellular digestion
  1. Single gastrovascular cavity opening i.e, Mouth
  2. Mouth present but anus absent
  1. Body consists of two tubes: outer formed by body wall, inner by digestive tract
  2. Organs, body cavities and tissues are present between the two tubes
Organisms
Sponges
  1. Coelenterata
  2. Platyhelminthes
  1. Nemathelminthes onwards

Table 1: Differences beween Protostomes and Deuterostomes and other stomes

Characteristics
Protostomes
Deuterostomes
Blastopore
  1. Mouth origin from blastopore.
  2. Mouth develops first in the embryo
  1. Anus origin from blastopore.
  2. Anus develops first in the embryo
Coelom formation
Schizocoely
Enterocoely
Cleavage
  1. Spiral cleavage
  2. Determinate cleavage
  1. Radial cleavage
  2. Indeterminate cleavage
Examples
  1. Annelida
  2. Arthopoda
  3. Mollusca
  1. Echinodermata
  2. Hemichordatata
  3. Chordata
Image 1
Q1.
'Deuterostomia' are the animals in which blastopore of gastrula becomes
Q2.
Which of the following phyla are included in Enterozoa?
📚
ANIMAL SYMMETRY
Image 1
Symmetry Type
Asymmetrical
Spherical symmetry
Radial symmetry
Biradial symmetry
Bilateral symmetry
Characteristics
  1. Body can't be divisible into two similar halves along any plane.
  2. Lack of polarity: There exists no clear differentiation along an axis.
  1. Body resembles a sphere, suited for floating and rolling animals
  2. Lack of polarity: There exists no clear differentiation along an axis.
  1. Body can be divided into similar halves by more than two planes passing through one main axis
  2. Have oral and aboral sides
  3. Usually exhibited in animals attached to the substratum
  4. Like a cake being divided and sub-divided into equal halves and quarters.
  1. Body can be divided into similar halves by two planes passing through one main axis
  1. Can be divided along a median Longitudinal or Sagittal plane into two mirrored portions (right and left halves)
  2. Bilateral animals are called Bilateria
  3. Strongly associated with cephalization
Organisms
▢ Protozoans:
❖ Exceptions:
◉ Spherical symmetrical:
  1. Volvox
  2. Heliozoa
  3. Radiolaria
◉ Bilateral symmetrical: Giardia lamblia
▢ Adult sponges:
❖ Exceptions:
◉ Radially symmetrical:
  1. Larva of sponges
  2. Sycon
  3. Leucosolenia
▢ Some molluscs:
  1. Gastropoda due to torsion
  2. sd
▢ Protozoa:
  1. Volvox
  2. Heliozoa
  3. Radiolaria
▢ Sponges:
  1. Larva of sponges
  2. Sycon
  3. Leucosolenia
▢ Most of coelentrates:
▢ Adult Echinodermata:
❖ Larval form: Bilateral symmetry
❖ Adult: Radial symmetry
  1. Sea anemones
  2. Sea walnuts (Comb jellies)/ Ctenophores
Flatworms to Mammals except some Molluscs and Echinodermata
Q1.
Radial symmetry occurs in
Q2.
Bilateral symmetry is absent in
Q3.
Which symmetry is found in sea anemone?
Q4.
Which of the following may exhibit biradial symmetry?
Q5.
Symmetry found in Heliozoa is
📚
METAMERISM/ SEGMENTATION
Segmentation is the serial repetition of similar organs, tissues, cell types or body cavities along the anterior posterior (A-P) axis of bilaterally symmetric animals
Image 1
Segmentation Type
Unsegmented
Pseudosegmented
True segmentation / Metamerically segmented
Characteristics
Body without a linear series of segments.
  1. Body with many false segments but are independent with each other.
  2. Body grows by addition of new segments from the anterior end.
  3. The body is divided into many segments known as Proglottids which are in different stages of maturation.
  1. Body with a linear series of segments, the segments are interdependent with each other and work together.
  2. All segments are in same stage of maturation.
Examples
  1. Nemathelminthes
  2. Molluscs
  3. Echinodermata
  1. Tapeworm
  1. Annelida (Polychaeta and Oligochaeta)
  2. Arthopoda
  3. Chordata
Q1.
Metamerism is characteristic of
Q2.
Body is unsegmented in
📚
ANIMAL HABITS
▢ Solitary:
❖ Characteristics:
  1. Lives singly.
❖ Examples: Sycon
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▢ Gregarious:
Image 1
Fig.Gregarious nature
in sea squirt
Credit:Britannica
❖ Characteristics:
  1. Lives in group but don't help each others.
❖ Examples:
  1. Sea squirts
▢ Colonial:
❖ Characteristics:
  1. Lives in group and help each others.
❖ Examples:
  1. Ants
  2. Bees
  3. Wasps
▢ Symbiosis:
❖ Characteristics:
  1. Lives in an intimate relationship with other animals or plants.
  2. both gets benefited from each other.
❖ Parasitic (+, -):
◉ Characteristics: The symbiont (a parasite) receives benefits at the expense of the host.
◉ Parasite:
◈ Ectoparasite:
■ Characteristics:
● newKey: Parasite are external.
■ Examples:
◈ Endoparasite:
■ Characteristics: Parasite are internal.
■ Examples:
  1. Liverfluke
  2. Roundworm
  3. Tapeworm
◉ Host:
◈ Definitive host:
■ Characteristics: Host in which parasite reach reproductive maturity.
■ Examples: Mosquito for Plasmodium
◈ Intermediate host:
■ Characteristics: Host that is required for parasite development, but don't reach reproductive maturity.
■ Examples: Man for Plasmodium
❖ Commensalism (+, 0):
Image 1
Fig.Euplectella
1 / 2
◉ Characteristics: Advantageous to one party (symbiont) but leaves other party unaffected (host).
◉ Examples:
  1. Spongicole living in Euplectella.
❖ Mutualism (+, +):
◉ Characteristics: Advantageous to one party (symbiont) but leaves other party unaffected (host).
◉ Examples:
  1. Zoocholera living in hydra.
📚
ANIMAL HABITATS
▢ Aquatic animals:
Lives in water.
❖ Marine:
◉ Key: Lives in sea.
❖ Freshwater:
◉ Key: Lives in pools, ponds, lakes, streams and rivers.
▢ Terrestrial animals: Lives on land
📚
NUTRITION
The means by which living organisms obtain the substances required for growth and the maintenance of life is called nutrition.
▢ Holozoic or Zootrophic nutrition (Animal-like):
❖ Key: Utilize ready made solid food in the from of other organisms such as microorganisms, bacteria, yeast, algae, protozoans and small metazoans.
❖ Examples:
  1. Amoeba
  2. Paramecium
▢ Holophytic or Autotrophic nutrition (Plant-like):
❖ Key: Obtain food by photosynthesis
❖ Examples:
  1. Euglena
  2. Volvox
▢ Saprophytic or Saprozoic nutrition (Fungi-like):
❖ Key: Obtain the dissolved substances in the medium either through the entire surface of the body or through special regions.
❖ Examples:
  1. Monocystis
  2. Trypanosoma
▢ Parasitic nutrition:
❖ Key: Get nourishment partially or wholly from the digested and decomposed substances of the food of host, either in holozoic or saprozoic manner.
▢ Mixotrophic or mesotrophic nutrition:
❖ Key: Feeds by more than one method at the same or different times.
❖ Examples:
  1. Entamoeba histolytica which although feed holozoically, also absorb dissolved organic compounds through general body surface.
  2. Euglena feed by both holophytically and saprophytically.
▢ Coprozoic nutrition:
❖ Key: Feed upon the faecal matter of other organisms.
❖ Examples:
  1. Copromonas is found in faeces of frog.
📚
METABOLISM
▢ Digestion:
Aspect
Intracellular Digestion
Extracellular Digestion
Definition
Digestion that occurs inside the cells with the help of lysosomal enzymes.
Digestion that occurs outside the cells in the digestive cavity with the help of secreted enzymes.
Process
  1. Food is engulfed by phagocytosis or pinocytosis.
  2. Digested inside food vacuoles.
  1. Digestive enzymes are secreted into a cavity.
  2. Food is broken down before absorption by cells.
Phyla (Examples)
  1. Porifera
  2. Coelenterata (Partially)
  3. Protozoa
  1. Coelenterata (Partially)
  2. Platyhelminthes onwards
Efficiency
Less efficient as digestion is limited to individual cells.
More efficient, allowing digestion of larger and complex food materials.
▢ Circulation:
Category
Open Circulation
Closed Circulation
Definition
Blood is not confined to blood vessels; it flows freely through body cavities (hemocoel).
Blood flows entirely within blood vessels throughout the body.
Heart Chambers
Usually simple or absent
Can vary (2 to 4 chambers)
Speed & Pressure
Slow and under low pressure
Faster and under high pressure
Oxygenation
Mixing of oxygenated and deoxygenated blood common
Usually separated unless heart is incompletely divided
Examples
  1. Arthropods
  2. Most Molluscs
  1. Annelids
  2. Cephalopods
  3. Vertebrates
Category
Single Circulation
Double Circulation
Definition
Blood passes only once through the heart in a complete circuit.
Blood passes through the heart twice: once for oxygenation and once for systemic distribution.
Heart Chambers
2 chambers (1 atrium, 1 ventricle)
3 or 4 chambers (2 atria, 1 or 2 ventricles)
Oxygenation
Deoxygenated blood is oxygenated and sent directly to body.
Pulmonary and systemic circuits separate oxygenated and deoxygenated blood.
Efficiency
Less efficient due to single pressure drop after gills
More efficient, maintains pressure in both lungs and body
Examples
  1. Fishes (Osteichthyes, Chondrichthyes)
  1. Amphibians (partial)
  2. Reptiles (partial/full)
  3. Birds
  4. Mammals
▢ Respiration:
Category
Simple Diffusion
Cutaneous Respiration
Tracheal Respiration
Branchial (Gill) Respiration
Pulmonary Respiration
Buccopharyngeal Respiration
Cloacal Respiration
Description
  1. Exchange of gases occurs directly through the body surface.
  2. No specialized respiratory structures.
  1. Exchange of gases through moist skin.
  2. Requires moist environment.
  1. Network of air tubes (tracheae) delivers oxygen directly to tissues.
  2. No need for circulatory system to transport gases.
  1. Gills extract oxygen from water.
  2. Highly vascularized structures.
  1. Lungs are used for gas exchange.
  2. Air is inhaled into alveoli where gas exchange occurs.
  1. Exchange of gases occurs through the moist lining of the buccal cavity and pharynx.
  1. Exchange of gases through the cloaca (a common opening for excretory and reproductive systems).
Examples / Phyla
  1. Porifera
  2. Coelenterata
  3. Platyhelminthes
  4. Nemathelminthes
  1. Annelids (e.g., Earthworm)
  2. Amphibians (e.g., Frog – supplement to lungs)
  1. Arthropods (e.g., Insects like Grasshopper)
  1. Aquatic Annelids
  2. Molluscs
  3. Crustaceans
  4. Fishes
  5. Amphibian larvae
  1. Amphibians
  2. Reptiles
  3. Birds
  4. Mammals
  1. Amphibians (e.g., Frog)
  1. Some turtles (e.g., Fitzroy River Turtle)
▢ Excretion:
Category
Ammonotelic
Aminotelic
Uricotelic
Ureotelic
Guanotelic
Nitrogenous Waste
Ammonia
Amino acids
Uric acid
Urea
Guanine
Examples
  1. Porifera
  2. Coelenterata
  3. Platyhelminthes
  4. Nemathelminthes
  5. Annelida
  6. Osteichthyes (Bony fish)
  7. Amphibian tadpoles (Frog tadpole)
  8. Crocodiles
  1. Mollusca
  2. Echinodermata
  1. Insects
  2. Birds
  3. Land snails
  4. Land reptiles (Lizard, Snake)
  1. Mammals
  2. Chondrichthyes
  3. Semi-aquatic amphibians (Frog, Toads)
  1. Spiders
Note
▢ Amphibian tadpoles:
❖ Frog:
◉ Hibernation and Aestivation: Uricotelic
◉ Regular Conditions: Ureotelic
◉ WHat is your name: My name is Rahul Kumar Yadav.
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Q1.
The excretion in birds and reptiles is:
📅BPKIHS 2015
Q2.
Animals in which nitrogen is predominantly excreted in the form of urea are
📅KU 2015
▢ Reproduction:
Category
Sexual Reproduction
Asexual Reproduction
Definition
Reproduction involving the fusion of male and female gametes (sperm and egg) to form a zygote.
Reproduction without the involvement of gametes; offspring arise from a single parent.
Gametes Involved
Yes (male and female gametes)
No gametes involved
Genetic Variation
Offspring show genetic variation (due to meiosis and recombination)
Offspring are genetically identical to parent (clones)
Types
  1. External fertilization
  2. Internal fertilization
  3. Self-fertilization (e.g., earthworm)
  4. Cross-fertilization
  1. Binary fission
  2. Budding
  3. Fragmentation
  4. Spore formation
  5. Regeneration
  6. Parthenogenesis
Examples
  1. Most vertebrates
  2. Humans
  3. Frogs
  4. Birds
  5. Reptiles
  6. Earthworms
  1. Amoeba (binary fission)
  2. Hydra (budding)
  3. Planaria (fragmentation)
  4. Yeast (budding)
  5. Starfish (regeneration)
Q1.
Which of the following pairs have the same body plan and symmetry?
Q2.
Schizocoel is the body cavity of
Q3.
Salamander is
Q4.
Starfish belong to
Q5.
Which one of the following is a true fish?
Q6.
Coelom derived from blastocoel is known as
Q7.
Which of the following is the smallest unit of classification?
Q8.
Neotype is
Q9.
Complexity in classification is of
Q10.
Which of the following category contains organism least similar to one another?
Q11.
Haemocoel is present in
Q12.
Most primitive organisms are
Q13.
Study of human race?
Q14.
Ichthyology is the study of
Q15.
Animals in which nitrogen is predominantly excreted in the form of urea are
Q16.
The term biology was coined by
Q17.
Metazoans without tissue grade organisation are called
Q18.
Tissue grade of organisation occurs in
Q19.
Radial symmetry occurs in
Q20.
Bilateral symmetry is absent in
Q21.
Which symmetry is found in sea anemone?
Q22.
All triploblastic animals are
Q23.
Metamerism is characteristic of
Q24.
Which of the following phyla are included in Enterozoa?
Q25.
'Deuterostomia' are the animals in which blastopore of gastrula becomes
Q26.
An enterocoelomate invertebrate group is
Q27.
Coelom derived from blastocoel is known as
Q28.
The larva of Physalia is called
Q29.
Which of the following may exhibit biradial symmetry?
Q30.
Symmetry found in Heliozoa is
Q31.
Which one feature is common to leech, cockroach and scorpion?
Q32.
How many germ layers are found in a sponge?
📚
ADDITIONAL QUESTIONS
Q1.
The organization in Sponges is
Q2.
Metazoans without tissue grade organisation are called
Q3.
Tissue grade of organisation occurs in
Q4.
Which level of organization is found in majority of animals?
Q5.
The blind sac body plan is shown by
Q6.
Which of the body plan is found in nematodes?
Q7.
Radial symmetry occurs in
Q8.
Bilateral symmetry is absent in
Q9.
Which symmetry is found in sea anemone?
Q10.
All triploblastic animals are
Q11.
Animals with radial symmetry in adult and bilateral symmetry in larvae are
Q12.
An animal with diploblastic and acoelomate condition is
Q13.
All triploblastic animals are
Q14.
Segmentation or Metamerism is first seen in
Q15.
Coelom or body cavity derived from blastocoel is known as
Q16.
A pseudocoel is found in
Q17.
The animals with pseudocoel are
Q18.
Coelom is a space between
Q19.
Body cavity lined by mesoderm is
Q20.
Animals which have well-marked digestive cavity are put under
Q21.
Which of the following phyla are included in Enterozoa?
Q22.
The earthworms, insects and snails are
Q23.
Which of the following group is deuterostome?
Q24.
'Deuterostomia' are the animals in which blastopore of gastrula becomes
Q25.
The following animal phylum belongs to Deuterostomia
Q26.
What is characteristic of Deuterostomes?
Q27.
In which one of the following groups, all animals are hermaphrodites?
Q28.
Which one feature is common to leech, cockroach and scorpion?
Q29.
Haemocoel is found in
Q30.
Haemocoel is found in
Q31.
Schizocoelomates and Enterocoelomates are
Q32.
Which of the following is the correct pairing of the classification group and common example?
Q33.
In which triploblastic animal, coelom is absent?
Q34.
Larva is found in
Q35.
Which is not correctly matched?
Q36.
Which of the following groups of animals is bilaterally symmetrical and triploblastic?
Q37.
The plane that divides the body into right and left halves
Q38.
Which animals do not exhibit radial symmetry?
Q39.
The body of the animal can be divided into identical halves in only one plane is
Q40.
The space between body wall and alimentary canal lined by mesoderm is called
Q41.
A bilaterally symmetrical deuterostome is classified in the phylum
Q42.
The most recently discovered animal phylum is
Q43.
Secondary body cavity with segmented mesoderm lining is called
Q44.
The animals of which phylum are called acoelomates?
Q45.
Which of the following is diploblastic?
Q46.
Which group of animals belong to the same phylum?
Q47.
An enterocoelomate invertebrate group is
Q48.
Coelom derived from blastocoel is known as
Q49.
The larva of Physalia is called
Q50.
Which of the following may exhibit biradial symmetry?
Q51.
Symmetry found in Heliozoa is
Q52.
Which one feature is common to leech, cockroach and scorpion?
Q53.
How many germ layers are found in a sponge?
Q54.
Body is unsegmented in
Q55.
Comb jellies belong to the phylum
📚
GRB QUESTIONS
Q1.
Which of the following statements is true.
Q2.
Which of the following statements is false?
Q3.
The organization in sponges is:
Q4.
Metazoans without tissue grade organization are called:
Q5.
Cell-tissue grade of organization occurs in:
📅AIPMT 2000
Q6.
Which level of organization is found in majority of animals?
Q7.
Match the phyla listed under Column I with the level of organization given under Column II; choose the answer which gives the correct combination of the alphabets of the two columns:
Phylum vs Level of Organization
Column I (Phylum)Column II (Level of Organization)
A. Protozoap. Protoplasmic
B. Poriferaq. Cellular
C. Cnidariar. Cell-tissue
D. Chordatas. Organ-system
Q8.
Cell aggregate body plan is exhibited by:
Q9.
The blind sac body plan is shown by:
Q10.
Which of the body plan is found in nematodes?
Q11.
Which of the following is rare in animals?
Q12.
Which of the following animals have radial symmetry?
Q13.
Radial symmetry occurs in:
Q14.
Which of the following metazoan phyla are grouped under Radiata?
Q15.
Which of the following is strongly associated with cephalization?
Q16.
Bilateral symmetry is absent in:
Q17.
Bilateral symmetry is accompanied by:
Q18.
Which symmetry is found in a sea anemone?
Q19.
Match the symmetry listed under Column I with the phylum given under Column II; choose the correct combination:
Symmetry vs Phylum
Column I (Symmetry)Column II (Phylum)
A. Asymmetryp. Arthropoda
B. Radial symmetryq. Ctenophora
C. Biradial symmetryr. Cnidaria
D. Bilateral symmetrys. Porifera
Q20.
All diploblastic animals are:
Q21.
A radially symmetrical diploblastic animal is:
Q22.
Organisms attached to substratum generally possess:
Q23.
Radial symmetry is often exhibited by animals having:
Q24.
Animals with radial symmetry in adult and bilateral symmetry in larva are:
📅MH-CET 2000•AFMC 2008
Q25.
An animal having diploblastic acoelomate condition is:
📅Odisha JEE 2006
Q26.
All triploblastic animals are:
Q27.
Choose the correct combination:
Q28.
Give the correct matching of term and description:
Q29.
Segmentation or metamerism is first seen in:
Q30.
Body is unsegmented in:
Q31.
Besides Annelida and Arthropoda, metamerism is found in:
Q32.
A coelom (body cavity) derived from blastocoel is known as:
📅PCS 2000•CPMT 2002•BV Pune 2003•RPMT 2005
Q33.
A pseudocoel is found in:
📅CPMT 2000
Q34.
The animals with pseudocoel are:
📅RPMT 2000•DPMT 2001
Q35.
Coelom is a space between:
📅JIPMER 2000•JKCMEE 2004
Q36.
Body cavity lined by mesoderm is:
📅JKCMEE 2002•JKCMEE 2005
Q37.
Uncoelomate invertebrate group is:
Q38.
Animals which have well marked digestive cavity are put under:
Q39.
Match the phyla listed under Column I with body cavity in Column II:
Phylum vs Body Cavity
Column I (Phylum)Column II (Body cavity)
A. Platyhelminthesq. No body cavity
B. Nematodar. Pseudocoel
C. Annelidas. Schizocoel
D. Echinodermatap. Enterocoel
Q40.
Which of the following phyla are included in Enterozoa?
📅RPMT 2001
Q41.
Protostomes and deuterostomes differ in:
Q42.
The earthworms, insects and snails are:
📅EAMCET 2000
Q43.
Which of the following group is deuterostome?
📅RPMT 2001
Q44.
Identify a deuterostome:
📅EAMCET•Har. PMT
Q45.
Deuterostomia are the animals in which blastopore of gastrula becomes:
Q46.
Which one of the following invertebrates is a deuterostome and enterocoelous coelomate?
📅MPPMT 2000
Q47.
The following animal phylum belongs to Deuterostomia:
📅Kerala PMT 2000•BHU 2001•Wardha 2011
Q48.
What is characteristic of deuterostomes?
📅DPMT 2001
Q49.
Identify the group in the following having all animals belonging to the same class:
Q50.
Choose the correct combination (Phyla - Classes):
📅CPMT 2000
Q51.
In which one of the following groups, all animals are hermaphrodites?
📅MPPMT 2001
Q52.
Gorilla, chimpanzee, monkey and man belong to the same:
Q53.
Which of the following shows sexual dimorphism?
📅RPMT 2001
Q54.
Poorly defined tissue layers are found in:
Q55.
Which one of the following animals is a deuterostome?
📅PCS 2002
Q56.
Embryologically speaking, coelom arises from a split in the mesodermal bands, plates or masses in:
📅PCS 2002
Q57.
Which of the following is wrongly matched?
📅Odisha JEE 2002
Q58.
Match the various classes given under Column I with the examples listed in Column II. Choose the answer which gives the correct combination of alphabets of the two columns:
Classes vs Examples
Column I (Classes)Column II (Examples)
A. PolychaetaNereis
B. TrematodaLiver fluke
C. ArachnidaScorpion
D. GastropodaPila
E. AsteroideaStarfish
📅Karnataka CET
Q59.
Which one of the following is a protostomian?
📅JKCMEE 2006
Q60.
In which of the following symmetry, the response to external stimulus is quicker and more precise?
📅EAMCET
Q61.
Which one of the following statements is true about organism and its classification?
📅AIEEE 2004
Q62.
Which one feature is common to leech, cockroach and scorpion?
📅AIIMS 2004, 2008
Q63.
Coelomate animal in which blastopore develops into anus is called:
📅Odisha JEE 2004
Q64.
From the taxonomy point of view, which one of the following is correct?
📅MPPMT 2004
Q65.
Haemocoel is found in:
📅BHU 2004, 2008; BV Pune 2001, 2008; Uttarakhand PMT; Odisha JEE 2011
Q66.
Which one of the following animals is correctly matched with its characteristic and taxon?
📅AIIMS 2006, 2008
Q67.
Metameric segmentation is the characteristic of:
📅AIPMT 2006
Q68.
Which one is incorrect?
📅Odisha JEE 2006
Q69.
Schizocoelomates and enterocoelomates are:
📅AFMC 2006; JCECE 2007
Q70.
Which of the following is the correct pairing of the classification group and common example?
📅BV Pune 2006
Q71.
The radial symmetry is found in:
1. Platyhelminthes
2. Coelenterates
3. Aschelminthes
4. Annelids
5. Echinoderms
📅Kerala PMT 2007
Q72.
Match the following sets (Set I — Set II):
Organism vs Larva
Column I (Organism)Column II (Larva)
A. Petromyzon4. Ammocoete larva
B. Holothuria3. Auricularia larva
C. Ambystoma2. Axolotl larva
D. Polychaeta5. Trochophore larva
E. Cnidaria1. Planula larva
📅Kerala PMT 2007; EAMCET 2001
Q73.
In understanding different types of symmetry, the term used as principal axis means:
📅EAMCET 2007
Q74.
Match the following animals with their correct identity:
Organism vs Common Name
Column I (Organism)Column II (Common name)
A. Euplectella3. Venus flower basket
B. Physalia5. Portuguese man of war
C. Pennatula1. Sea pen
D. Enterobius2. Pinworm
E. Alytes4. Midwife toad
📅Kerala PMT 2007
Q75.
Which one of the following groups of three animals each is correctly matched with their one characteristic/morphological feature?
📅AIPMT 2008
Q76.
Which one of the following phyla is correctly matched with its two general characteristics?
📅AIPMT 2008
Q77.
Which of the following statement is false?
📅CMC Vellore 2008
Q78.
Triploblastic, unsegmented, acoelomate exhibiting bilateral symmetry and reproducing both asexually and sexually, with some parasitic forms. The above description is characteristic of the phylum:
📅CMC Vellore 2008
Q79.
In which triploblastic animal, coelom is absent?
📅OU-JEE 2008, 11
Q80.
Match Column I with Column II and select the correct option:
Phylum vs Example
Column I (Phylum)Column II (Example)
A. ProtozoaMonocystis
B. AschelminthesWuchereria
C. PoriferaCliona
D. CtenophoraBeroe
E. CnidariaPennatula
📅Kerala PMT 2008
Q81.
Larva is found in:
📅Odisha JEE 2008•Pb. PMT 2008
Q82.
Which is not correctly matched?
Q83.
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
📅AIPMT 2009
Q84.
Deuterostome condition and indeterminate radial cleavage are characteristics of:
📅AMU 2009
Q85.
The cross section of the body of an invertebrate is given. Identify the animal which has this body plan.
📅Karnataka CET 2009
Q86.
What is the best way to test the relatedness of two species?
📅Odisha JEE 2009
Q87.
Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?
📅AIPMT 2010
Q88.
Which of the following statements are correct with regard to deuterostomes?
📅EAMCET 2010
Q89.
Choose the animal which exhibits the following characteristics:
1. Marine habitat.
2. Bilateral symmetry and cephalization.
3. Haemocoel as principal body cavity.
4. Eyes similar to that of vertebrates.
📅EAMCET 2010
Q90.
The plane that divides the body into right and left halves:
📅EAMCET 2010
Q91.
Which animals do not exhibit radial symmetry?
📅IIPP
Q92.
The body of the animal can be divided into identical halves in only one plane:
📅JKCMEE 2010
Q93.
The space between body wall and alimentary canal lined by mesoderm is called:
📅JKCMEE 2010
Q94.
A bilaterally symmetrical deuterostome is classified in the phylum:
📅COMEDK 2010
Q95.
Which one of the following animals is correctly matched with its particular named taxonomic category?
📅AIPMT 2011
Q96.
Which of these statements are incorrect?
(i) Parapodia are lateral appendages in arthropods used for swimming.
(ii) Radula in molluscs are structures involved in excretion.
(iii) Aschelminthes are dioecious.
(iv) Echinoderm adults show radial symmetry.
(v) Ctenophorans are diploblastic.
📅Kerala PMT 2011
Q97.
Among the following, which one is not a deuterostome?
📅JKCMEE 2011
Q98.
The most recently discovered animal phylum is:
📅JKCMEE 2011
Q99.
Secondary body cavity with segmented mesodermal lining is called:
📅JKCMEE 2011
Q100.
The animals of which phylum are called acoelomates?
📅MPPMT 2011
Q101.
Which one of the following the genus name, its two characters and its class/phylum are correctly matched?
📅AIPMT 2011
Q102.
Read the following statements and select the correct option: Circulatory system in arthropods is of closed type; Parapodia in annelids help in swimming; Phylum Mollusca is the second largest animal phylum; Helminthes are dioecious.
📅Kerala PMT 2012
Q103.
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?
📅AIPMT 2012
Q104.
The figure shows four animals (1) Taenia solium, (2) Aurelia (Jellyfish), (3) Scorpion, (4) Octopus (Devil fish). Select the correct answer with respect to a common characteristic of two of these animals.
📅AIPMT 2011
Q105.
Choose the correct pair:
📅Kerala PMT 2012
Q106.
Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature, and correctly described?
📅AIPMT Mains 2012
Q107.
Which of the following is diploblastic?
📅Odisha JEE 2012
Q108.
Mouth develops first in the embryo and anus is formed later in:
📅BHU 2012
Q109.
Which group of animals belong to the same phylum?
📅KEET-UG 2013
Q110.
Match the name of the animal (Column I) with one characteristics (Column II) and the phylum/class (Column III) to which it belongs:
Q111.
Which of the following are correctly matched with respect to their taxonomic classification?
📅NEET-UG 2013
Q112.
Match the following list of animals with their level of organization and choose the correct sequence:
Level of Organization vs Example
Column I (Level of Organization)Column II (Example)
A. Organ levelq. Fasciola
B. Cellular aggregate levelr. Spongilla
C. Tissue levels. Obelia
D. Organ system levelp. Pheretima
📅Karnataka CET 2013
Q113.
Which one of the following groups of three animals each is correctly matched with their one characteristic morphological features?
📅Karnataka CET 2013
Q114.
Match Column I with Column II and choose the correct answer:
Characteristic vs Example
Column I (Characteristic)Column II (Example)
A. Incomplete digestive system4. Platyhelminthes
B. Cellular level organization1. Sponges
C. Radial symmetry2. Coelenterates
D. Pseudocoelomate5. Aschelminthes
E. Metamerism3. Annelids
📅Kerala PMT 2014
Q115.
The kind of coelom represented in the diagram given below is characteristic of:
Q116.
Identify and select the correct match in Columns I, II and III:
📅MH-CET 2014
Q117.
Coelom is lined on all sides by:
📅JKCMEE 2015
Q118.
Identify the phylum X:
Q119.
From the above table, find out the missing organ/function for A, B, C, D, and E respectively:
📅Kerala PMT 2015