A student examines a picture of an important biological molecule in a textbook and writes four statements about the molecule in a chart Which statement needs to be revised to make it true

Which of the following examples can cause gene flow between populations? a. an increase in predators to a population of zebra b. a volcanic eruption that kills half of a population of mice c. bird droppings that contain seeds from a different location d. a person that sprays a toxin on a group of mosquitoes

How does the study of genetic disorders such as pku biologists understand normal alleles?

Which level of taxonomy has the fewest organisms?