Which of the following describes the function of lymph nodes?

a) filter lymph using lymphocytes
b) filter blood using antibodies
c) filter lymph using antibodies
d) filter blood using lymphocytes

What are two reasons for why a species might disappear from the fossil record?

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

When analyzing tree rings, what do scientists assume a thin ring indicates?