First three layers of microsporangium which does the function of protection are
Epidermis, middle layer, endothecium
Epidermis, mesocarp, endocarp
Epidermis, endothecium, middle layer
Epidermis, endocarp, mesocarp
Pollen grains are generally _________ in outline measuring _________ micrometers in diameter.
If there are four cells in a anther, what will be the number of pollen grains?
In monocots, male gametophyte is
Intine of pollen grains is composed of
Which one of the following is resistant to enzyme action?