Ques:Answer the following question given this paragraph: During adulthood, testosterone is needed for the production of sperm. Q: During adulthood, what is needed for the production of sperm? Choices: - steroids - estrogen - androgen - testosterone A:

Ans:testosterone
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Ques:Answer the following question given this paragraph: 19.5 Capacitors and Dielectrics A capacitor is a device used to store electric charge. Capacitors have applications ranging from filtering static out of radio reception to energy storage in heart defibrillators. Typically, commercial capacitors have two conducting parts close to one another, but not touching, such as those in Figure 19.13. (Most of the time an insulator is used between the two plates to provide separationsee the discussion on dielectrics below. ) When battery terminals are connected to an initially uncharged capacitor, equal amounts of positive and negative charge, +Q and Q , are separated into its two plates. The capacitor remains neutral overall, but we refer to it as storing a charge. Q: What do we call a device used to store electric charge? Choices: - charger - amplifier - battery - capacitor A:

Ans:capacitor
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Ques:Answer the following question given this paragraph: Phytoplankton are "plant-like" plankton. Since they make food by photosynthesis, they live in the photic zone. Most are algae. Q: Which type of plankton make food via photosynthesis? Choices: - dinoflagellates - common plankton - zooplankton - phytoplankton A:

Ans:phytoplankton
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Ques:Answer the following question given this paragraph: Osmotic pressure is important in biological systems because cell walls are semipermeable membranes. In particular, when a person is receiving intravenous (IV) fluids, the osmotic pressure of the fluid needs to be approximately the same as blood serum; otherwise bad things can happen. Figure 11.4 "Osmotic Pressure and Red Blood Cells" shows three red blood cells: Figure 11.4 "Osmotic Pressure and Red Blood Cells"a shows a healthy red blood cell. Figure 11.4 "Osmotic Pressure and Red Blood Cells"b shows a red blood cell that has been exposed to a lower concentration than normal blood serum (a socalled hypotonic solution); the cell has plumped up as solvent moves into the cell to dilute the solutes inside. Figure 11.4 "Osmotic Pressure and Red Blood Cells"c shows a red blood cell exposed to a higher concentration than normal blood serum (hypertonic); water leaves the red blood cell, so it collapses onto itself. Only when the solutions inside and outside the cell are the same (isotonic) will the red blood cell be able to do its job. Q: Osmotic pressure is important in biological systems because cell walls are what? Choices: - impassable - theonym membranes - variably membranes - semipermeable membranes A:

Ans:
semipermeable membranes
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