Explain the characteristics of Hydra.

Study the following statements
A) Corallium rubrum is the precious red stone coral that belongs to Scyphozoa
B) Renette gland is an excretory gland found in round worms
C) Tubifex is an aquatic annelid
D) In chilopods, maxillae are modified into gnathochilarium

Among the above, the incorrect statements are

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

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

Write four distinguishing characters of phylum- Echinodermata

Draw and identify different parts of a tapeworm and liver fluke.

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