B if it’s not correct sorry
Plant cells have what is perhaps the most complex outer coverings. Plant cell walls are made largely of cellulose which forms strong, highly rigid, almost indigestible coverings that protect the cell and gives it shape.
Answer:
An RNA single-stranded molecule that is complementary to one of a gene's DNA strands, to be precise.
Explanation:
DNA sequences or segments code for proteins or molecules with defined functions, called genes.
The answer is “Variation that decrease reproductive success are more likely to be passed on.”
Matter can be recycled, but energy cannot. Also, only 10% of the energy is passed through each trophic level.
