State why most biologists consider rna to be life’s first coding system.

The image shows embryos of three vertebrate classes

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.

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.