The chemicals that send instructions to cells are:

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.

Classify the structures as homologous or analogous, depending on their structure and function.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above