Some lizard species contain females only, so there is no sexual reproduction. In these populations, what would be the major source of variation for natural selection?
A. recombination.
B. independent assortment. C. segregation. D. mutation.

What is the farthest destination to date for a human spaceflight mission?

Explain why scientists use the word dominant for certain traits.

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.