Question

The functional role of sporopollenin is primarily to

A) comprise spore surface structures that catch the wind and assist in spore dispersal.
B) reduce dehydration.
C) make spores less dense and able to disperse more readily.
D) repel toxic chemicals.
E) provide nutrients to spores.

Answer 1

The primary function of sporopollenin is to protect spores and pollen grains from dehydration, as well as other environmental stresses, ensuring their viability over extended periods.

Step-by-step explanation:

The functional role of sporopollenin is primarily to reduce dehydration. Sporopollenin is a complex polymer found in the cell walls of spores and pollen grains that makes them highly resistant to various forms of environmental stress, including drying out, or desiccation. It is known for being chemically and biologically tough, preventing the spore or pollen from being degraded.

Not only does sporopollenin protect against dehydration, but it also shields these reproductive cells from oxidative damage and enzymatic degradation. This creates the conditions necessary for the spores and pollen to remain viable over long periods which can include several hundred million years, as evidenced by well-preserved pollen fossils. Thus, the correct answer to the student's question is (B) reduce dehydration.

Answer 2

Answer;

B) reduce dehydration.

Explanation;

• Sporopollenins are the chemical component that make up the outer wall of pollen grains, spores and many related microorganisms.
• It is one of the most chemically inert biological polymers. It is a major component of the tough outer walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
• The functional role of sporopollenin is primarily to reduce dehydration.