Animal Kingdom Test 17

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Animal Kingdom Test 17

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Question 1
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : An anti-coagulant hirudin is present in salivary glands of leech.
Reason : It leads to blood clotting while the leech is feeding.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

An anti-coagulant hirudin is present in salivary glands of leech. It prevents the blood from clotting while the leech is feeding.
Question 2
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Birds are oviparous.
Reason : Oviparous animals give birth to young ones of their own kind.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Oviparous are animals which lay eggs. e.g., Reptiles, birds, etc.
Question 3
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : All chordates are vertebrates.
Reason : They possess hollow vertebral column that protects nerve cord or spinal nerves.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

All chordates are not vertebrates: Vertebrates have vertebral column but protochordates and agnatha have notochord that is not replaced by vertebral column.
Question 4
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Annelids like Nereis can easily swim in water.
Reason : An adult Nereis develops fins.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Annelids like Nereis possess lateral appendages, parapodia, which help in swimming.
Question 5
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Frogs are poikilotherms .
Reason : They can withstand cold weather and high temperature.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Amphibians (frogs) are poikilotherms, also called cold blooded or ectothermic animals.
The cold blooded animals change their body temperature according to the surroundings (do not possess a constant body temperature). Also, being poikilotherms, they cannot withstand cold weather and high temperature.
Question 6
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Cnidarians, Ctenophorans, and Echinodermates show radial symmetry.
Reason : Their body can be divided into two equal halves by cutting it in any plane passing through the central axis.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Cnidarians, ctenophorans, and echinodermates show radial symmetry because their body can be divided into two equal halves by cutting it in any plane passing through the central axis.
Question 7
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Fishes belonging to class Osteichthyes have to swim constantly.
Reason : Air bladder is absent in these fishes.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Fishes belonging to class Chondrichthyes have to swim constantly. It is because air bladder is absent in these fishes therefore, they have to swim constantly to avoid sinking.
Question 8
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Whale is a mammal.
Reason : They respire with the help of lungs only.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Whale is a mammal. The hairs on its body are lost due to aquatic adaptation. They respire with the help of lungs only.
Question 9
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : The fishes belonging to class Chondrichthyes must swim constantly.
Reason : They possess four pairs of gills which are covered by an operculum on each side.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

The fish belonging to class Chondrichthyes have to swim constantly because air bladder is absent in these fishes therefore, they have to swim constantly to avoid sinking. In these fish, gill slits are separate and not covered by operculum.
Question 10
1 / -0

Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : Excretory organs are absent in phylum Platyhelminthes.
Reason : Flame cells are the respiratory organs of Platyhelminthes.

A
A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B
B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Flame cells are the excretory organs of Platyhelminthes and other related animals which possess flickering cilia or flagella for driving the excretory products.

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Animal Kingdom Test 17

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Animal Kingdom Test 17

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SHARING IS CARING

Question 1

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 2

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 3

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 4

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 5

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 6

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 7

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 8

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 9

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 10

A. Both Assertion (A) and reason (R) are true and reason (R) is the correct explanation of Assertion (A).

B. Both Assertion (A) and reason (R) are true but reason (R) is not the correct explanation of Assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

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