Which animal groups shows body surface respiration?

Why do the higher animals not show body surface respiration?

Name two animal groups showing gill respiration?

Which higher animal groups use skin as respiratory organs?

True/false Hydra shows direct and body surface respiration.

True/false Frog shows only cutaneous respiration.

Which animal groups have antennary glands, nephridia and coxal glands as their excretory organs.?

Name the first animal group to have blood - vascular sytem.

In the pie charts (A) and (B) drawn below to show the global animal diversity, which groups of animals would you name and write on the the areas shaded black in (A) and (B). In which kind of habitat would you find this groups of animals?

In which animal phylum body cavity appears for the first time?