The main function of white blood cells in the body is to (1) carry oxygen (2) help in clot formation (3) produce more red cells (4) protect body against diseases Answer : protect body against diseases...
Which of the following statements does NOT apply to arteries when comparing them to veins: a) have thick walls b) carry blood away from heart c) highly elastic walls d) have valves. Answer : ANSWER: D -- HAVE VALVES ...
To carry out photosynthesis plants require (1) Oxygen (2) Carbon-dioxide (3) Nitrogen (4) Hydrogen Answer : Carbon-dioxide...
Exchange of oxygen, carbon dioxide, nutrients and waste products from mother to fetus occurs through diffusion across the: a) chorionic villi (pron: core-e-on-ick villi) b) endometrium c) corpus luteum d) colostrum Answer : ANSWER: A -- CHORIONIC VILLI...
Most of the carbon dioxide picked up by the blood in the tissues: a) dissolves in the plasma b) unites with hemoglobin c) forms microscopic bubbles d) diffuses into the alveoli Answer : ANSWER: A -- DISSOLVES IN THE PLASMA...
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