Question

which of the following has proved helpful in preserving pollen as fossils?

Answer 1

Sporopollenin; It is a major component of the tough outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments. As well As, The chemical composition of sporopollenin is not exactly known, due to its unusual chemical stability and resistance to degradation by enzymes and strong chemical reagents. Analyses have revealed a mixture of biopolymers, containing mainly long chain fatty acids, phenylpropanoids, phenolics and traces of carotenoids.
Electron microscopy shows that the tapetal cells that surround the developing pollen grain in the anther have a highly active secretory system containing lipophilic globules. These globules are believed to contain sporopollenin precursors. Chemical inhibitors of pollen development and many male sterile mutants have effects on the secretion of these globules by the tapetal cells.
Thus, because all of these features, and its ability to cover up a pollen grain for a long amount of liable time, it is a good chemical component used for preservation for pollen grains.

Answer 2

Heya !!!

Here's your answer !!!

It's sporopollenin....

The hard outer layer called the exine of pollen is made up of Sporopollenin..

It's one the most resistant organic material....


Hope this helps you :)

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