The only process of ATP production in cells using fermentation is
A. electron transport.
B. the Calvin cycle.
C. the Krebs cycle.
D. glycolysis.
E. photosynthesis.
D. glycolysis.
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Embryonic cell cycles allow the rapid division of cells in the early embryo. These mitotic cell cycles are much shorter in length than the mitotic cell cycles of cells in a mature organism. In the embryonic cell cycles, mitosis takes approximately the same amount of time as it does in the cell cycles of mature cells. What do you think is a result of the embryonic cycle?
A. Resulting daughter cells are smaller than the mother cell in the embryonic cell cycles. B. Resulting daughter cells do not contain the same genetic information as the mother cell in the embryonic cell cycles. C. Resulting daughter cells cannot form a mitotic spindle in the embryonic cell cycle. D. Mother cells in the embryonic cell cycle spend the majority of their time in G0. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about the cell cycle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following is true for a nerve cell at rest?
A. Channels allow for the movement of potassium out of the cell. B. Sodium ions are concentrated outside the cell. C. Channels allow for the movement of chloride into the cell. D. Channels allow for the movement of potassium out of the cell AND sodium ions are concentrated outside the cell.
Answer the following statements true (T) or false (F)
1. Streptomyces are aerobic soil bacteria that produce over two-thirds of our antibiotics of natural origin. These antibiotics should also be effective in killing Streptomyces. 2. Streptomyces are obligate aerobic soil bacteria that infect many plant roots, causing scabs on their leaves. You would expect to find more Streptomyces near the surface of the soil. 3. Antibiotics usually are not dangerous to use in treating bacterial infections because most antibiotics exploit structures and functions in bacteria that are not present in host cells. 4. Pili are bacterial structures used primarily for motility. 5. Autotrophs must acquire carbon from organic molecules produced from other organisms.
The developmental fate of a cell is established by the process termed
A) development. B) differentiation. C) determination. D) specialization. E) A, B, and C only