Question

Write any two differences between integument and testa.

Hint:

Integuments become the testa after fertilization, forming a protective layer around the seed.

Answer 1

The integument and testa are both related to the outer covering of seeds, but they differ in origin and function. Step 1: Definition and Origin.
- Integument: It is the protective outer layer of the ovule that develops into the seed coat after fertilization. - Testa: The testa is the outermost layer of the seed coat, derived from the integument of the ovule.
Step 2: Differences.
1. Integument: It is part of the ovule before fertilization and forms the seed coat after fertilization. Testa: The testa is the seed coat formed from the outer layer of the integument. 2. Integument: It is present in the ovule and forms part of the seed during embryogenesis. Testa: It is the mature seed coat that protects the embryo from physical damage and desiccation.
Final Answer: 1. Integument forms part of the seed coat, while testa is the fully developed seed coat. 2. Integument is part of the ovule, whereas testa is part of the seed after fertilization.