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;

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.

1. when the tempature rises,your sweat glands and then springs into action making perspiration. some sweat evaporates with your skin taling heat with it.2.some of the blood pumped by the heart travels by your lungs to get rid of carbon dioxide and pick up oxygen.3.saliva produces by, you drinking water which saliva is 98% of. when mucus builds up in your body it also creates saliva as well as, antibacterial compunds.4.when the core body tempature drops, the shivering reflex is triggered to maintain homeostasis. for example: when you get out the pool you start to shiver because it is cold.