Question

Which layer of seed coat is thicker ?

Answer 1

The outer seed coat is thicker which is also known as testa.

Answer 2

The outer layer of a seed is the thickest layer of seed, it is also known as testa.

This thick layer if seed protects the seed from environmental harms such as sunlight, water and cold temperatures. It also provides safety to seeds against harmful insects during storage and seed sowing.