I believe the anwser you are looking for is the
Cell Membrane.
It is a substance that lets things in and out of the cell
The answer is C. simply because the rest are not benefits but rather are harmful occurrences
A. talk about sheep having arthritis which is a disease and in this case genetic modification is possibly the cause of it
B. the transfer of modified genes to other crops is not a good thing because the genes are modified and this can cause unknown negative mutations
D. in general unpredictable genetic changes are most of the time negative and there's a small chance of that mutation being positive
The bat is the most qualified in being the secondary consumer. Cat eats bat, bat eats insect, insect eats leaf.
B phenotype (think pheno= physical)
