D. is the correct answer. It uses neurons to signal.
The statement "When levels of the amino acid are high, it binds to the repressor, allowing synthesis of this amino acid to proceed" (A).
E. coli needs amino acids to survive. It can ingest the amino acid, Tryptophan from the environment. When the levels of Tryptophan are low, it can synthesize Tryptophan by using enzymes that are encoded in five genes. These genes lie next to each other in the tryptophan operon. If tryptophan is available in the environment, E. coli will not synthesize it.
No. beta vulgaris do not need <span>long periods of moderately intense sunlight</span>
Answer:
be involved in the rapid uptake of compounds from the cell's environment
Explanation:
Cells in an organisms are defined as the basic building unit of life. It is the most important unit in a living organisms. Cells gives the structure to the bodies and carries the most important functions of the organism.
The size of the cells are important in performing many functions, which includes cellular communications, materials exchange from the surrounding environment, etc. The rapid cellular uptake of the compounds are proportional to the surface area of the cells or its size.
Thus, in the context, two cells having the greater surface area or size are more likely to uptake the compounds from cell's environment.
