Select the correct answer. What is a risk assessment?
OA.
a daily routine or way of living
OB.
a limited set of choices
Oc. a judgment regarding a hazard
OD. a baseline analysis of daily habits

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.