Which type of operon, an inducible one or a repressible one, would an organism likely use to produce enzymes and other proteins required to metabolize a nutrient in its environment?

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?