DENDROLOGY

DENDROLOGY AND SOCIETY

FAMILIES OF ANGIOSPERMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Male gamete in angiosperms are formed by the division of
A
generative cell
B
vegetataive cell
C
microspore mother cell
D
microspore
Explanation: 

Detailed explanation-1: -The male gametes of angiosperms consist of two sperm cells within a pollen grain or a pollen tube. They are derived from a single generative cell, which is formed as the smaller cell by unequal cell division in the microspore after meiosis.

Detailed explanation-2: -So, the correct answer is ‘Generative cell’

Detailed explanation-3: -After fertilization, the generative nucleus divides to form two nuclei, one is called male gametic nucleus and other is sperm nucleus. So, as the pollen tube is growing, at its tip, there are three nuclei, male gametic nucleus, sperm nucleus and tube nucleus without a cell wall, sharing a common cytoplasm.

Detailed explanation-4: -The generative cell of male angiosperm gametophytes is haploid. The cell divides to produce two haploid sperm cells.

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