In the early 1980s scientists were able to produce two biomolecules by splicing a human gene into the bacterium E. coli to make recombinant human insulin and growth hormone. Which
statement best explains why this experiment was successful?

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.

Por qué crees que los huevos con cáscara se llaman amnióticos?