The two substances that scientists use are
carbon-14 and carbon-12
The advantage that is conferred to algae and plants that have sporopollenin is that they have reproductive cells that are more resistant to desiccation. Remember that a sporopollenin is a polymer that is inert and makes up the outer layer of pollen grains and spores. Sporopollenin<span> is also found in the cell walls of several taxa of green </span>alga<span>, including Phycopeltis </span>
Answer: i don't really think they are but whales can kill dolphins by sitting on them so yeah i guess their a little afraid
Explanation: