Please help i am give brainilest Which of the following characteristics is shared by viruses and living cells? Both viruses and living cells –

A. have a nucleus, as well as a cell wall.

B. contain nucleic acids such as DNA or RNA.

C. can replicate independently of a host cell.

D. use organelles to perform life functions.

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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.

Competition occurs between species when

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?