Diversity in Li...

Marine animals are classified according to the depth at which they live. Which of the following animals is found floating at the sea surface?

Consider the following statements and choose the correct option:

a. In Protozoa, all the vital activities of the body are performed by a single cell.
b. In Parazoa, the cells are organised into structural and functional units called tissues, organs and organ systems.

Animals, not having coelom, are called acoelomate animals. Which of the following are acoelomate animals?

In which of the following organisms of Phylum Protozoa, locomotory organs are absent?

Which of the following organisms of Phylum Platyhelminthes is free-living, soft-bodied, leaf-like flatworm having a simple gut with mouth, pharynx and intestine?

Which of the following organisms of Phylum Mollusca has bilaterally symmetrical body that is convex dorsally and flattened ventrally?

Consider the following statements and choose the correct option:

a. Molluscs are essentially aquatic, mostly marine, few fresh-water and some terrestrial forms.
b. Body of molluscs is covered with a thick chitinous cuticle forming an exoskeleton.

Phylum Porifera is divided into three classes. Which of the following organisms is marine, vase-shaped, simple sponge with spicules of calcium carbonate?

Phylum Chordata includes animals bearing notochord. Which of the following is a characteristic of chordates?

Which of the following classes includes all marine and predaceous fishes with cartilaginous endoskeleton?

Match the following:

Which of the following possesses electric organs as modified musculature between eyes and nostrils?

Class Amphibia includes nearly 3000 living species. Which of the following is not a characteristic of organisms of this class?

Class Reptilia includes nearly 7000 living species. Which of the following organisms does not belong to the class?

Which of the following organisms of class Mammalia is an egg-laying mammal?