Assertion Reason Test: Animal Kingdom - NEET MCQ

Reason is also true, i.e. Nacre secreting cells are present just below the nacreous layer.

But reason is not the correct explanation for assertion. 

Reason is also true, i.e. all three phyla include members with bilateral symmetry and true coelom.

But the reason is not the correct explanation for assertion.

Balanoglossus belong to phylum hemichordate where proboscis gland performs an excretory function.

Reason is also true, i.e. Glomerulus is present in proboscis responsible for or mediating the excretory function of proboscis gland. Both Assertion and reason are correct, and reason is the correct explanation for assertion.

Reason is also true as echinoderms have secondarily adapted to radial symmetry because larval forms of echinoderm are bilaterally symmetric, but adults are radially symmetric.

Both assertion and reason are correct, but reason is not the correct explanation for assertion. 

Reason is also true as neurons in Hydra are apolar. These apolar neurons (with no axon terminals) can join to form nerve net. Hence both Assertion and Reason are correct, and Reason is the correct explanation for Assertion.

Radula is absent in class pelecypoda (Bivalvia) of molluscs.

Reason is also false as radula bears chitinous teeth.

Both assertion and reason are false. 

Reason is true, and Annelids have longer alimentary canal than body and space for storing gametes.

Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion. 

Reason is false as chitin is impermeable to water and does not allow water vapour diffusion from atmosphere to body or vice-versa.

Assertion is true, but Reason is false.

Reason is false as in sub-class Prototheria of class Mammalia, testis is abdominal and remains inside abdominal cavity.

Reason is correct as the south American ostrich (Rhea Americana) is a flightless bird with urinary bladder (Exception).

Both Assertion and Reason are true, but reason is not the correct explanation for assertion. 

Reason is false as Koel exhibit Brood Parasitism, as Koel lays egg in crow nest.

Both Assertion and Reason are correct, and Reason is the correct explanation for Assertion.

Reason is correct as bats and whales show echolocation and possess four chambered heart.

Both Assertion and Reason are correct, but Reason is not a correct explanation for Assertion. 

Reason is true as animals' age can be deduced by lines of growth on both the scales.

Reason is false as amphibian possess 10 pairs of cranial nerves and mammals to possess 12 pairs of cranial nerves. 

Reason is wrong as viviparity is exhibited by mammals, some reptiles, and some lower animals even before shelled egged animals first evolved.

Reason is also true as air sacs make ventilation in birds highly efficient. Air sacs ensure air flow over the gas exchange surface in only one direction and do not allow mixing of air. Thus air sacs supplement respiration in birds.

Both Assertion and Reason are true, but Reason is not the correct explanation for Assertion.