Why would an ecosystem with only a few different types of organisms have less complex food web than any ecosystem with many different types of organisms?

*will mark brainliest to the first and correct answer less species diversity results in less a. oxygen b. food c. drinkable water d. all of the above

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.

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time