How many grana are typically present in a single chloroplast?

Tomatoes,carrots,and chillies are red in colour due to the presence of a specific pigment. Name the pigment. Is it a photosynthetic pigment?

The plastids which store proteins are

Which of the following is not responsible for the color of the plant parts?

Based on the type of pigments,which types of plastids can be classified in plants?

In the given figure,what do '$a$' and '$b$' represent respectively?