How might the stability of an ecosystem be affected if all of the decomposers were suddenly removed?

Which describes radioactive decay of a substance

The genetic code is essentially the same for all organisms. based on this information, one can logically assume which of the following statements to be correct? a. dna was the first genetic material. b. the same codons in different organisms translate into the different amino acids. c. different organisms have different numbers of different types of amino acids. d. a gene from an organism can theoretically be expressed by any other organism. e. all organisms have experienced convergent evolution.

Ahuman female has a special pair of chromosomes that are represented by the letters a) xx. b) xy. c) yy. d) xz.