In which groups of animals would you find water circulation?

(a) In which group of animals would you find Aristotle's lantern ? What is its function ? (b) Which animal is considered to be a symbol of 'unio till death ' and is presented as a costly married gift in Japan as dried and cleaned skeleton?

(a) In which groups of non-chordates would you find closed circulatory system ? (b) Why is closed circulatory system advantageous ?

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 area shaded black in (A) and (B). In which kind of habitat would you find those groups of animals ?

In which group are animals more alike

In which group of animals, coelom is filled with blood?

Which group of animals has stomochord?

Which group of animals belong to same phylum

Which group of animals are called flat worms?

What is the closed circulatory system? Name two groups of animals having this types of circulation.