Which of the following best describes calcitonin? A. It's released by the adrenal medulla. B. It's released by the parathyroid gland. C. It functions to prevent hypercalcemia. D. It functions to prevent hypocalcemia.

How do enzymes make reactions go faster? They lower activation energy They raise the activation energy They supply extra reactants They limit the amount products in the reaction

The layers of earth are based on what two sets of characteristics?

Which of these best describes genetic drift

Photosynthesis organism produce surges molecules from radiant energy and inorganic substances these sugar molecules are then to provide then used to provide energy so the organism can grow and move which energy transformation occurs in the second

The activities of enzymes are determined by their three dimensional structure. Which of the following gives a three dimensional structure to an enzyme? A.) Folds of long, linear chains of amino acids B.) Folds of long, linear chains of fatty acids C.

A dog and a pig attempt to mate. we are aware that these are two different animal species. but what is the best explanation for the barrier that makes it impossible for them to successfully mate?

How do fossils and fossil record support the idea that life changes over time

1 reason why cases of violence and abuse are not reported

Question number 3 Site A is pavement. Site B is bare soil. Site C is a forest. Soil erosion caused by runoff will be greatest at Site be greatest at Site

True or false Hydroelectric power plants are built on rivers that are flat and slow moving.