A =Cyclostomata have an elongated body bearing 6-15 pairs of gill slits.
R =They help in digetion
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option C
A =Heart is three chambered in cartilaginous fishes.
R =One auricle and two ventricle
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option D
A =As the name indicates (Amphi = single, bios = life) in Amphibians
R =Amphibians can live in aquatic as well as terrestrial habitats.
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option C
A =Heart is usually three chambered in reptillia.
R =Heart is two chambered in crocodiles
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option C
A =Heart is usually three chambered in reptillia.
R =Heart is two chambered in crocodiles
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option C
A =The hind limbs generally have scales and are modifided for walking, swimming or clasping.
R =The short bones are hollow with posseses air cavities
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option C
A =The most uniques mammalian characteristic is the presence of milk producing glands.
R =They have two pairs of limbs, adapted for walking, running, climbing, burrowing swimmingand flying.
A. Both Assertion and Reason are true and Reson is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. Assertion is true but reason is false
D. Both Assertion and Reason are false.
Answer : Option B