Three chambered heart is found in:

Which one of the following animals has a three-chambered heart?

Which of the following classes of animals has/have three-chambered heart?

Pheromones are found in –

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): Amphibians can tolerate mixing of oxygenated and deoxygenated blood. Reason (R): Amphibian…

Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?