The intine of pollen grains is composed of

Intine of pollen grain is composed of.

Exine of pollen grains is composed of

Exine of pollen grain is composed of

Pollen grain is

Pollen grain is

Pollen grain is

Select the correct Statement . a. Intine of pollen grains is composed of pectocellulosic in nature . b. Pollen grains develop from the haploid microspore mother cells in pollen sacs of anther. c. Pollen grain is diploid , unicellular , multinucleate and oval shaped structure. d. Pollen grains are generally spherical measuring about 20-25 mm in diameter .

The exine of a pollen grain is composed of one of the most resistant biological matieral by which pollen grains are able to withstand extremes of temperature and dessication and cannot be degraded by any enzyme is