Which class includes animals having cartilaginous endoskeleton?

Animals belonging to class Cyclostomata have cartilaginous endoskeleton.

Select the animal having venous heart.

Bat is included in which class ?

Name An animal having canal system and spicules

Which factor of an ecosystem includes plants, animals and microorganisms?

Which of the following animals do not have closed circulation?

Use of ICT. Find how the vestigial organs in certain animals are functional in others. Present the information in your class and send it to others.