Question

Generally the number of integuments in the ovule of angiosperms and gymnosperms is

• A. Two and two
• B. Two and one
• C. One and one
• D. One and two

Answer 1

Answer: (B)

The protective envelope surrounding the body of ovule is known as integument. Ovules are classified in three categories on the basis of number of integuments:

1. Unitegmic: When there is single integument in the ovule, then it is known as unitegmic. e.g. Gymnosperms.
2. Bitegmic: When there are two integuments in the ovule, then it is known as bitegmic. e.g. Angiosperms.
3. Ategmic: When there is no integument in thew ovule, then it is known as ategmic. e.g. Santalum.

So, generally the number of integuments in the ovule of angiosperms and gymnosperms is two and one respectively.