Humans are warm-blooded. they are able to maintain a contant body temperature despite changing environmental temperatures. which part of the brain controls body temperature? a. thalamus b. hypothalamus c. cerebellum d. cerebrum

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.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.