38. A. Oxygen: carbon dioxide
39. The correct response is B. All living things must carry out cellular respiration to release the chemical energy stored in the bonds in food molecules. One such important molecule is glucose. As glucose is broken down during anerobic respiration, as in yeast cells, 2 A.T.P. are yielded provide the energy for its life processes. In aerobic organisms, such as plants and animals, 36 A.T.P. are the net result. It is the A.T.P. which supplies our cells with the energy for metabolic processes.
40. D. Fermentation.
Answer:
When a stem cell divides, each new cell has the potential to either remain a stem cell or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell or a brain cell. There are three characteristics of all stem cells.
Explanation:
C. Increased levels of carbon dioxide in seawater would cause ocean acidification and weaken corals.
Cytoskeleton is the structure in the cell that provides support to the cell just like a skeleton in a human body
cross-sectional studies are a type of prevalence study that make a one-time assessment (similar to a snapshot) of disease in a study group.
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