Each cell expresses, or turns on, only a fraction of its genes. the rest of the genes are repressed, or turned off. the process of turning genes on and off is known as gene regulation. gene regulation can occur at any point during gene expression, but most commonly occurs at the level of when the information in a gene's dna is transferred to mrna.

the correct answer is "transcription"

Explanation: Gene regulation is the process of activation and deactivation of genes. In the early stages of development, cells begin to assume specific functions. Gene regulation ensures that the affected genes are expressed at the appropriate times. Within the gene regulation factors are transcription factors, which are proteins that bind to DNA near the area where the gene is located, helping or inhibiting the transcription machinery. Other forms of regulation include epigenetic processes such as methylation, acetylation, phosphorylation, interference RNAs, among others. This entire regulatory network works together controlling the appropriate rates and times when genes are transcribed into mRNA.

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

mark brainliest!

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.