Please help with the question below! FAST!

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.

Why is excretion necessary to maintain homeostasis?

Which of the following are responsible for sending messages from the hypothalamus to the thalamus?