Answer:
Plasmid DNA play a important role for survival of a prokaryotic cell.
Option D is correct one.
Explanation:
In addition to the chromosome, many prokaryotes have plasmids, which are small rings of double-stranded extra-chromosomal ("outside the chromosome") DNA. Plasmids carry a small number of non-essential genes and are copied independently of the chromosome inside the cell. They can be transferred to other prokaryotes in a population, sometimes spreading genes that are beneficial to survival.
For instance, some plasmids carry genes that make bacteria resistant to antibiotics. (These genes are called R genes.) When the plasmids carrying R genes are exchanged in a population, they can quickly make the population resistant to antibiotic drugs. While beneficial to the bacteria, this process can make it difficult for doctors to treat harmful bacterial infections.
Answer: Natural science can be divided into two main branches life science and physical science. Life science is alternatively known as biology, and physical science is subdivided into branches physics, chemistry, earth science, and astronomy.
Answer:
The very limited gene pool of wild cheetahs is an example of evolutionary decline
Explanation:
When there is limited gene pool of wild cheetah is an example of evolutionary decline, as there is decrease in number of gene pool of cheetah in the wild which makes it to be scarce
When people used stone tools,
The in-between period of time when the first man appeared and when man developed a writing system. Or the period of time before man became literate.
I think it would be D. Dominant
