Uday 2025

PRACTICE SHEET

(BIOLOGY)
Chapter: Animal Kingdom
Multiple Choice Answer Type Questions 8. Which of the following is NOT the common
fundamental feature for animal classification?
1. Which of the following groups of animals
(1) Germinal layers
reproduces only by sexual means?
(2) Pathway of water transport
(1) Ctenophora (2) Cnidaria
(3) Pattern of organization of cells
(3) Porifera (4) Protozoa
(4) Serial repetition of the segments
2. When any plane passing through the central axis of Assertion and Reason Answer Type Questions
the body divides the organism into two identical
halves, the organism is called _________. Direction: Each of these questions contains two
(1) radially symmetrical statements Assertion (A) and Reason (R). Each of these
(2) bilaterally symmetrical questions also has four alternative choices, any one of
(3) asymmetrical which is the correct answer.
(4) metamerically segmented 9. Assertion (A): Tapeworm, roundworm and
pinworm are endoparasites of human intestine.
3. _________ is (are) responsible for maintaining the Reason (R): Improperly cooked food is the source
current of water in sponges. of intestinal infections.
(1) Osculum (2) Porocytes You have to select one of the codes (1), (2), (3) and
(3) Spongocoel (4) Choanocytes (4) given below.
(1) Both Assertion (A) and Reason (R) are the
4. Which of the following features in birds indicate true, and Reason (R) is a correct explanation
their reptilian ancestry? of Assertion (A).
(1) Eggs with a calcareous shell. (2) Both Assertion (A) and Reason (R) are the
(2) Scales on their hind limbs. true, but Reason (R) is not a correct
(3) Four-chambered heart. explanation of Assertion (A).
(4) Two special chambers-crop and gizzard in their (3) Assertion (A) is true, but Reason (R) is false.
digestive tract. (4) Assertion (A) is false, but Reason (R) is true.

Very Short Answer Type Questions

5. The heart in crocodile is of:
(1) 3 chambered (2) 2 chambered 10. Define metamerism.
(3) 4 chambered (4) 1 chambered
11. Give an example of an egg laying mammal.
6. Flame cells present in platyhelminthes are
specialised for: 12. Give an example of a fresh water sponge.
(1) respiration and absorption.
(2) osmoregulation and circulation. 13. What is bioluminescence?
(3) respiration and excretion.
(4) osmoregulation and excretion. Short Answer Type Questions
14. Differentiate between:
7. In amphibians, respiration occurs through: (a) Open circulatory system and closed circulatory
(1) gills (2) lungs system.
(3) skin (4) all of these (b) Direct development and indirect development.

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15. Write the similarities between: In some animals, the body is externally and internally
(a) Aves and Mammals divided into segments with a serial repetition of at
(b) Frog and Crocodile least some organs. For example, in earthworm, the
body shows this pattern called metameric
16. List any four identifying features of phylum segmentation and the phenomenon is known as
Arthropoda and give examples. metamerism.

Long Answer Type Questions I. Mesoglea is:

(1) a differentiated layer.
17. Enlist the main features of aschelminthes with
(2) an undifferentiated layer.
examples. Draw the male and female diagram of an
(3) both (1) & (2)
aschelminth also.
(4) a segmented layer.
Case Based Study Answer Type Questions
II. Which of the following mentioned phyla is
18. Read the following and answer any four acoelomate?
questions. (1) Annelida (2) Arthropoda
Animals in which the cells are arranged in two (3) Platyhelminthes (4) Echinodermata
embryonic layers, an external ectoderm and an
internal endoderm, are called diploblastic animals, III. Coelom is lined by which of the following layer?
e.g., coelenterates. An undifferentiated layer (1) Mesoderm (2) Ectoderm
mesoglea is present in between the ectoderm and the (3) Endoderm (4) None of these
endoderm.
Coelom: Presence or absence of a cavity between the IV. In which of the following phyla, mesoderm is
body wall and the gut wall is very important in present as scattered pouches in between the
classification. The body cavity, which is lined by ectoderm and endoderm?
mesoderm is called coelom. Animals possessing (1) Annelida (2) Aschelminthes
coelom are called coelomates, e.g., annelids, (3) Platyhelminthes (4) Chordates
molluscs, arthropods, echinoderms, hemichordates
and chordates. In some animals, the body cavity is V. Diploblastic animals show the presence of an:
not lined by mesoderm, instead, the mesoderm is (1) external endoderm.
present as scattered pouches in between the ectoderm (2) internal endoderm only.
and endoderm. Such a body cavity is called (3) internal ectoderm only.
pseudocoelom and the animals possessing them are (4) external ectoderm and an internal endoderm.
called pseudocoelomates, e.g., Aschelminthes. The
animals in which the body cavity is absent are called
acoelomates, e.g., Platyhelminthes.
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 Answer Key

1. (1) 6. (4)
2. (1) 7. (4)
3. (4) 8. (2)
4. (2) 9. (2)
5. (3) 18. I-(2), II-(3), III-(1), IV-(2), V-(4)

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 Hints & Solutions

Multiple Choice Answer Type Questions Assertion and Reason Answer Type Questions
1. (1) 9. (2)
Ctenophora group of animals reproduces only by Both Assertion (A) and Reason (R) are the true,
sexual means. but Reason (R) is not a correct explanation of
Assertion (A).
2. (1)
(i) Asymmetrical: Any plane that passes through Very Short Answer Type Questions
the centre does not divide the organisms into 10. The body of an organism is externally and internally
equal halves. E.g. Mostly Sponges. divided into segments with a serial repetition of at
(ii) Radial Symmetry: Any plane passing through least some organs. This phenomenon is known as
the central axis of the body divides the metamerism. E.g., metameric segmentation in
organism into two identical halves. E.g. earthworm.
Coelenterates, Ctenophores and Adult
Echinoderms. 11. Ornithorhynchus (Duck-billed platypus) is an
(iii) Bilateral Symmetry: Body can be divided into example of egg-laying mammals.
identical left and right halves in only one
plane. E.g. Annelids,Arthropods, etc. 12. Spongilla is an example of fresh water sponge.

3. (4) 13. Bioluminescence is the property of a living

Choanocytes are responsible for maintaining the organism to emit light. It is well-marked in
current of water in sponges. ctenophores.

4. (2) Short Answer Type Questions

The dry skin of reptiles is covered with scales to 14. (a)
prevent water loss as an adaptation to terrestrial Open Circulatory Closed Circulatory
life.The hind limbs of birds also have scales which System System
confirm their reptilian ancestry.
1. Blood is pumped into Blood is pumped
the body cavity. through the vessels by
5. (3)
the heart.
Crocodile has a four-chambered heart. Amphibians
and the reptiles (except crocodiles) have a 3- 2. Dorsal blood vessel Dorsal and ventral
chambered heart with two atria and a single present. blood vessels present.
ventricle. 3. Capillary system is Capillary system is
absent. present.
6. (4) 4. Blood is in direct Blood is not in direct
The flame cells help in excretion and contact with the contact with the
osmoregulation. surrounding tissues. tissues.
5. It is primarily found It is found in
7. (4) in invertebrates. vertebrates and a few
In amphibians respiration takes place by gills, invertebrates, like
lungs, lining of buccopharygeal cavity and through earthworms.
skin.
6. No transport of gases. Gases are transported.
8. (2) 7. The fluid flowing in Fluid flowing in this
Pathway of water transport is not the common this system is called system is called
fundamental feature for animal classification. haemolymph. blood.

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14. (b) Long Answer Type Questions
Direct Development Indirect 17. Features of Aschelminthes:
Development • They are pseudocoelomate, bilaterally
1. When the larval stage When the life cycle of symmetrical, triploblastic, unsegmented,
is absent in the life an organism includes a vermiform organisms with complete digestive
cycle of an organism, larval stage, distinctly tubes.
it is called direct different from the • They are mostly aquatic, free-living or
development. adult, it is called parasitic and can be microscopic or more than
indirect development. a metre in length.
2. Metamorphosis is Metamorphosis • They have a cylindrical or thread-like body
absent. involving with a cuticle and tapering ends.
development of larva • They have an organ-system level of body
to a sexually mature organisation.
adult is present. • They are dioecious, with males being smaller
than females. Sexual dimorphism is
3. It occurs in fishes, It occurs in most of the
prominent.
reptiles, and birds. invertebrates,
• Male animal is smaller with curved posterior
mammals and
end; contains copulatory pineal setae. Genital
amphibians.
tract joins digestive tract to form cloaca.
• Female animal is longer with straight body
15. (a) The similarities between Aves and mammals
and cloaca absent.
are both are vertebrates (have backbone) and
Example: Ascaris lumbricoides (Round Worm),
are endothermic (warm-blooded) animals. Enterobius vermicularis, Ancylostoma duodenale,
(b) The similarities between frog and crocodile are Wuchereria bancrofti.
both use lungs for breathing, and both can live
on land as well as water.

16. Four identifying features of Arthropoda:

(i) Body is segmented and divided into head,
thorax and abdomen with jointed appendages.
(ii) They have chitinous exoskeleton.
(iii) Blood flows in open tissue spaces and
haemocoel instead of blood vessels.
(iv) Blood is colourless called haemolymph (e.g.,
Insect). Respiratory pigment absent. Copper
containing pigment haemocyanin is found in
some arthropods (e.g. Prawn)
Example: Apis (Honey bee), Bombyx, Case Based Study Answer Type Questions
Anopheles, Locust, Butterfly, Scorpion, Prawn. 18. I-(2), II-(3), III-(1), IV-(2), V-(4)

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