Answer: B Meiosis
Explanation: A single cell, which has 46 chromosomes, divides two times to produce four cells containing half of the original amount of genetic information.
Answer:
Each cell expresses, or turns on, only a fraction of its genes. The rest of the genes are repressed, or turned off. Signals from the environment or from other cells activate proteins called transcription factors. These proteins bind to regulatory regions of a gene and increase or decrease the level of transcription.
Explanation:
Answer:
the answer is A . i think so
List the examples please?
Answer:
new cells come only from existing