___ flowers are invariably autogamous as there is no chance of cross pollen landing on the stigma.

___ is the transfer of pollen grains from anther to the stigma of another flower of the same plant.

Pollen grains are able to withstand extremes of temperature and desiccation because their exine is com…

Cleistogamous flowers are ______</h2></div>

Where do the ovules grow?

Which of the following defines the characteristics of family <span>Asclepiadaceae</span>?</h2&gt…

Which is not diploid?</h2></div>

<div>Embryo without plumule, radicle and cotyledon is formed in</div></h2></div>