What body system regulates the acid based balance of the blood?

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.

Which image shows labeled organelles that are present only in plant cells?

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?