Anybody got studying tips for biology ? ! lmk by 8

Which experiment would most likely contain experimental bias

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.

Actual age your first developed of age well comparison age refers to absolute age true or false