Give scientific classification of shark up to class.

Write four distinguishing characters of phylum- Echinodermata

Distinguish between butterfly and bat with the help of four distinguishing properties.

To which phylum does Cockroach belong? Justify your answer with scientific reasons.

Give scientific reasons. Though tortoise lives on land as well as in water, it cannot be included in class- Amphibia.

Give scientific reasons. Our body irritates if it comes in contact with jellyfish.

Give scientific reasons. All vertebrates are chordates but all chordates are not vertebrates.

Give scientific reasons. The body temperature of reptiles is not constant.