By the ligand receptors on the surface of the cell membrane. How do transport proteins make it easier for certain molecules to diffuse across a membrane.
the binding of a signaling molecule, or ligand, to its receiving molecule, or receptor.
Answer: D. a genetic bottleneck
Explanation:
A genetic bottleneck also known as a population bottleneck is one that describes a sharp reduction in the size of a population caused by environmental events like in the above or caused by human activities.
D. Genetic makeup of the animal
The best choice is A.
A gene is a specific sequence of nucleotides in DNA or RNA that is located usually on a chromosome and that specifies the structure of a particular polypeptide and especially a protein, or controls the function of other genetic material.
Information from the gene is copied (transcribed) on mRNA in the nucleus. mRNA then leaves the nucleus and enters the cytoplasm where it attaches to a ribosome. The information on the attached mRNA is decoded (translated) by tRNA which then fetches the amino acids according to this information and brings them to the ribosome where they are linked together to form the specified protein.
In light of my perception, I can finish up the accompanying:
1)Test life form A matures lactose
2)Test life form A delivered gas
3)Test life form A brought down the pH of the medium
<span>4)Test life form B does not mature lactose</span>