Mention a mollusk with internal shell.

Mention a mollusc with internal shell.

Shell is internal in

Shell is internal in

Shell is internal in

Mention any two internal factors, that affect the rate of respiration in plants.

Pearl is a hard object produced within the soft tissues of a mollusk. Which one of the following is the main constituent of pearl?

Mention the internal factors affecting the rate of photosynthesis.

Mention two characteristics of a crystalline solid which are the expressions of its internal regularity.

Mention any two factors on which the internal resistance of the cell depends.