What is a major source of calcium and sodium in oceans? A. air pollutants B. gases from active volcanoes C. minerals dissolved in aquifers D. weathering and erosion of rocks

To be considered a living thing an organism must be able to a. move independently B. adapt to change c. Produce oxygen d. increase in size

Pregnancy, which is characteristically associated with changes in hormone levels in the body is a process tightly regulated by:

Which of these organisms digest its food before taking it into its body A. earthworms b. humans c. tree d. fungus

Select all that apply natural selection 1. is random 2. favors organisms well adapted to the environment 3. cannot work if beneficial traits are not hereditary 4. is often called survival of the fittest

This DNA nucleotide is the base-pair for guanine

If an incision were made distal to the elbow, where would it be located? 1. posterior to the elbow 2 closer to the fingers than the elbow 3 closer to the shoulder than the elbow 4 anterior to the elbow

Match the spheres with their correct description. 1. hydrosphere 2. biosphere 3. atmosphere 4. cryosphere 5. lithosphere a. the system that contains all living things b. the system that contains the solid, rocky crustal portion c.

2) This is a process in which water moves through a membrane, from an area of high concentration to an area of lower concentration.

Severe combined immunodeficiency (SCID) : A. is a result of the absence of macrophages or B cells B. affects only part of the adaptive immune response. C. can be caused by failure of TAP transporters. D. can be caused by failure of VDJ recombination.

The enzymes used in all experiments in this lab was