List of top Zoology Questions

Ontogeny repeats phylogeny. It was the

Assertion (A): Sertoli cells provide nourishment to developing sperm cells.
Reason (R): Sertoli cells secrete testosterone.
Identify the correct option from the following

Assertion (A): Incisors are useful in cutting the food.
Reason (R): They are chisel shaped.

Study the following statements and identify the correct option.
Statement I: Atrial natriuretic peptide (ANP) is released from left atrium of the heart.
Statement II: ANP can cause vasodilation.

Which of the following statements about competition are correct?
I) The competitive exclusion principle states that species with identical niches can coexist indefinitely.
II) Resource partitioning reduces competition by allowing species to use resources differently.
III) Unrelated species can compete, if they rely on the same unlimited resources.
IV) Competitive release occurs when a species expands its niche after a competitor's removal.

Statement-I: In cockroach, mycetocytes of fat bodies secrete fats.
Statement-II: Haemocytes in cockroach are phagocytic.

Assertion (A): Binary fission in {Paramecium} is called perkinetal fission.
Reason (R): Plane of fission in {Paramecium} is at right angles to longitudinal axis of the body.

Statement-I: Areolar tissue forms supporting framework for lymphoid organs.
Statement-II: Reticular tissue forms the packing tissue in almost all organs.

The following are the names of larvae of certain phyla. Identify the larva(e) that belongs to Annelida.
I) Parenchymula
II) Planula
III) Miracidium
IV) Nauplius
V) Glochidium
VI) Trochophore
VII) Bipinnaria

Assertion (A): In cellular level of organisation different types of cells are functionally isolated.
Reason (R): This is due to the absence of sensory cells and nerve cells.

Tall T-wave of ECG indicates

This hominoid is more ape like.

Assertion (A): Genetic drift tends to reduce the amount of genetic variation within the population.
Reason (R): In genetic drift alleles with low frequencies are removed in a population.

Cystic fibrosis is characterised by