In mammals, air enters lungs through tubes called, which branch into smaller tubules called, which extend out to tiny air sacs called. trachea; bronchioles; spongy tissue. bronchi; bronchioles; alveoli. bronchi; alveoli; gills.

Which of these best illustrates natural selection? An organism with favorable genetic variations will tend to survive and breed successfully A population monopolizes all of the resources in it habitat, forcing other species to migrate A community

This diagram is of an amniote egg what are the correct labels for this diagram? A zygote albumin umbilical cord B embryo shell placenta C placenta yolk sac womb D amnion shell yolk sac

Why is a standard system of measurement important?

Which part of a deoxynucleoside triphosphate (dntp) molecule provides the energy for dna synthesis?

Which of the following is Not noted when samples of insects are taken? the location of the body the temperature who collected the sample the closest body of water

Can a solution have a color?

If a planet entered a black hole would it crush the planet completely or in theory would chunks make it through?

Fish are classified as vertebrates because they have a. a brain. b. a backbone. c. two germ layers. d. bilateral symmetry.

Explain the contribution that fungi make to their environment.

Originally, how many kingdoms were there? Why?