In the mamalian male reproductive system the part that serves as a passage for both urine and semen is known as what?

Which of the following would most likely be key to gathering evidence that the rna world hypothesis is valid? creation of suitable environments for long-term study of single-celled organisms simulation of early earth conditions and long-term study of the resulting molecules development of a system for studying the microsphere's ability to absorb additional molecules categorization of the different specific conditions that result in the development of microspheres

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

According to this food web which of the following would be considered primary consumers