Which do solar flares and coronal mass ejections have in common? Select the two correct responses.

A: They appear as dark spots on the sun's surface.

B: They are explosive events that can affect Earth.

C: They are caused by the sun's changing magnetic field.

D: They tend to occur during minimum points in the solar cycle.

Ascientist and her team counted 200 individual deer in an area of 10 square kilometers. what is the population density?

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.

As a small change in a person's dna can cause a genetic disorder