A successful food web needs to have all of the organisms mostly bigger than the ones that they are eating otherwise the food web wouldnt neccessarily work properly and then the food webs would all be messed up.
C) Natural selection
When something happens in nature and something changes all of a sudden, the animals tend to adapt to what gives them more chances of survival. As a result, a large amount of the population would attempt to adapt in a way that helps them survive.
The answer would be Nucleic Acids
MRNA is needed in the cells because it directs the synthesis of proteins which is found in the cytoplasm. It is a molecule that carries the message contained within DNA to the ribosome. The Proteins are assembled on the ribosomes using the mRNA nucleotide sequence as a guide.
Plant cells have a cell wall that adds an additional layer of protection from the external environment.
