A mutation in a gene results in an animal that cannot make a protein that allows muscles to contract which of these is most likely to happen

d i think its   answer d

is in the form atp or adenosine triphosphate

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

"do a testcross with a homozygous recessive plant."