DNA replication begins when something called Helicase (an enzyme) unwinds the helix structure of the DNA. It does this so that Primase can then come along and set down an RNA primer.
Pollution caused the environment to become more darkly colored, so moths were selected to be blacks and greys. Before pollution they were white and lighter colors. <span />
Answer:
cell wall is found only in plant cell
Explanation:
cell wall and chloroplast is found only in plant cell but cell membrane,nucleus cytoplasm, ribosomes etc are found in both plant and animal cell
The two words are Genus and Species.
