Which of these disorders occurs when there is a loss of blood flow and in turn oxygen to the brain?

Which best explains how this maneuver unblock a person's airway?

Although there are a limited number of amino acids many different types of proteins exist because..

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.