How did photosynthetic cyanobacteria alter the composition of gases in the atmosphere and the ocean?

What role does differential reproduction play in natural selection? ! a) some organisms have different reproductive success due to nongenetic traits. b) some organisms have traits that them reach reproductive age. c) different methods of reproduction result in some organisms being genetically altered. d) reproduction varies among organisms due to pathogenic factors. the answer is not a or d based on other posts.

Me with biology endocrine system crossword also image left i need with hw

Gene expression is the activation of a gent that results in a question 1 options: protein dna mitochondria