Biology
Given below is a longitudinal section of a bean seed. Label the parts marked 1 to 5 and write their functions.
Answer
The parts marked 1 to 5 are:
- Testa
- Plumule
- Radicle
- Micropyle
- Cotyledon
Their functions are as follows:
- Testa — It protects the seed from insect and bacteria as well as from mechanical injury.
- Plumule — It develops into the shoot.
- Radicle — It develops into the root.
- Micropyle — It absorbs and allows the entry of as much water as is required for germination.
- Cotyledons — They contain stored food material which is used by the seedlings for growth.