The tiny hollow air sacs where oxygen exchange occurs are
a. lymph nodes.
b. capillaries.
c. alveoli.
d. bronchioles.

Anton created a chart listing different types of materials. which best complete the chart?

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection

In "the pig," what is the main effect that the piglet initially has on kibuka?