Under natural conditions, which of the following may cause allele frequencies to change? a. limited resources, which could cause one allele to have an advantage b. a random assortment of alleles during sexual reproduction c. no emigration from the population d. no immigration into the population

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.

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?