Answer:
a. the coordinated control of gene expression in bacteria
Explanation:
An operon in bacteria is a collection/cluster of genes that are under the control of a single promoter. It includes 3 components: a promoter, the genes and an operator. The operator is where a repressor binds, and the promoter is where transcription begins.
Operons allow organisms to control the expression of multiple genes in response to environmental cues
Answer:
Biologists measure the number of trophic levels in an ecosystem so as to check its stability and health.
Explanation:
Trophic levels are the feeding position in a food chain such as primary producers, consumers, etc. They are positions that an organisms occupies in a food chain (series of steps in which organisms transfer energy by eating or being eaten);- what it eats and what eats it.
Theoretically there is no any limit to the number of trophic levels in a food chain or number of organisms that live on each level.
Answer:
I believe it would either be A or D hope that helps sorry not much help
The correct option is B.
The chromosome is a thread like structures, which is made up of nucleic acid and protein. It is usually found in the nucleus of living organisms and it normally carry genetic information in form of genes.
Answer:
in anaphase.
Explanation:
during which each chromosome's sister chromatids separate and move to opposite poles of the cell.
