Question

What is the functions of testa and tegmen

Answer 1

Testa developed by outer integument
while tagmen develop by inner integument
there both function is to provide protection to the seed

Answer 2

Answer:

There is no much difference in the structure and function of both of these structure.

Explanation:

the testa is secreted by the outer integument while the tegmen is secreted by the internal integument but both of them are same function wise as both of these provides protection and safety to the seed. Both of them are membranes that have specific structure.