10th Science Book Back Answers Unit 13 – Structural Organisation Of Animals:

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Samacheer Kalvi 10th Science Book Back Answers Biology Unit 13 – Structural Organisation Of Animals:

Samacheer Kalvi 10th Science Book Subject One Mark, Two Mark Guide questions and answers are below. Check Science Book Back Questions with Answers. Take the printout and use it for exam purposes.

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10th Science – Biology

Unit 13: Structural Organisation Of Animals

I. Choose the best answer:

1. In leech locomotion is performed by
a) Anterior sucker   b) Posterior sucker   c) Setae   d) None of the above
Ans : (d) None of the above

2. The segments of leech are known as
a) Metameres (somites)   b) Proglottids   c) Strobila   d) All the above
Ans : (a) Metameres (somites)

3. Pharyngeal ganglion in leech is a part of
a) Excretory system   b) Nervous system   c) Reproductive system   d) Respiratory system
Ans : (b) Nervous system

4. The brain of the leech lies above the

a) Mouth b) Buccal Cavity c) Pharynx d) Crop
Ans : (c) Pharynx

5. The body of the leech has
a) 23 segments   b) 33 segments   c) 38 segments   d) 30 segments
Ans : (b) 33 segments

6. Mammals are animals.
a) Cold-blooded   b) Warm-blooded   c) Poikilothermic   d) All the above
Ans : (b) Warm-blooded

7. The animals which give birth to young ones are
a) Oviparous    b) Viviparous   c) Ovoviviparous   d) All the above
Ans : (b) Viviparous

II. Fill in the blanks

1. The posterior sucker is formed by the fusion of the _______segments. Ans: last seven
2. The existence of two sets of teeth in the life of an animal is called ______dentition. Ans: Diphyodont
3. The anterior end of the leech has a lobe-like structure called ______. Ans: Anterior Sucker
4. The blood-sucking habit of the leech is known as _____. Ans: Sanguivorous
5. _________separate nitrogenous waste from the blood in rabbits. Ans: Kidney
6. _______spinal nerves are present in rabbits. Ans: 37 pairs

III. True or False (Correct the Statement if it is false)

1. An anticoagulant present in saliva of leech is called heparin.
Ans: False. An anticoagulant present in saliva of leech is called hirudin.

2. The vas deferens serves to transport the ovum.
Ans: False. The vas deferens serves to transport the sperms.

3. The rabbit has a third eyelid called tympanic membrane which is movable.
Ans: False. The rabbit has a third eyelid called Nictitating membrane which is movable.

4. Diastema is a gap between premolar and molar teeth in rabbit.
Ans: False. Diastema is a gap between the incisors and premolar teeth in rabbit.

5. The cerebral hemispheres of rabbit are connected by band of nerve tissue called corpora quadrigemina.
Ans: False. The cerebral hemispheres of rabbit are connected by band of nerve tissue called corpus callosum.

IV. Match the following(match columns I, II, III correctly):

Question.

Answer:

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