Question

Question Number 2

What are the two types of ovules in the basis on integuments?​

Answer 1

Answer:

In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: The integument, forming its outer layer, the nucellus (or remnant of the megasporangium), and the female gametophyte (formed from a haploid megaspore) in its center.

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Answer 2

The two special integuments are

(1) Aril:- It is the type of third integument which develops from funicle at the base of the ovule.

e.g. Myristica, Asphodelus and Litchi.

(2) Caruncle:- It is also known as strophiole. It is formed because of the proliferation that means out growth of outer integuments over the micropyle. e.g. Ricinus communis (castor). It is made up of sugary contents. It is helpful in absorption of water during germination of seeds & dispersal of seeds occurs by ants which is known as myrmecochory.