Why is it vital for the chromosomes to be separated properly during meiosis so that each sperm or egg that is created ends up with exactly 23 chromosomes in humans?

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic.b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy.c. all bacterial enzymes are harmful to humans and the environment.d. microbes create pollutants and toxins that harm the environment.

Modern whales developed their traits through natural selection what occurs during the process of natural selection

All vaccination should(n’t) be mandatory! 1.at least 5 sentences explaining 2.why? 3.in the end summarize the sentence