What are the modifications that are observed in birds that help them fly?

Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?

Segmentation in the body is first observed in which of the following

• Platyhelminthes

• Aschelminthes

• Annelida

• Arthropoda

Match the following:

Prepare a list of some animals that are found parasitic on human beings.

In some animal groups, the body is found divided into compartments with at least some organs/ organ repeated. This characteristic feature is named

• Segmentation

• Metamerism

• Metagenesis

• Metamorphosis

17.

Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?

• Choanocytes

• Interstitial cells

• Gastrodermal cells

• Nematocytes

Which one of the following sets of animals share a four chambered heart?

• Amphibian, Reptiles, Birds

• Crocodiles, Birds, Mammals

• Crocodiles, Lizards, Turtles

• Lizards, Mammals, Birds

Which of the following pairs of animals has non-glandular skin

• Snake and Frog

• Chameleon and Turtle

• Frog and Pigeon

• Crocodile and Tiger

Birds and mammals share one of the following characteristics as a common feature.

• Pigmented skin

• Alimentary canal with some modification

• Vivipary

• Warm-blooded nature