Aboxer has been jumping rope for an hour his leg muscles are burning and he feels weak what substance is most likely cause of the burning he feels in his muscles

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.

The body is protected against harmful flu viruses by

Match the types of competition to their descriptions