Answer the following question given this paragraph: Q: Pigments are substances that absorb what? Choices: - synthetic light - artificial light - natural light - visible light A:
visible light
Answer the following question given this paragraph: Two main zones based on depth of water are the photic zone and aphotic zone. The photic zone is the top 200 meters of water. The aphotic zone is water deeper than 200 meters. The deeper you go, the darker the water gets. That's because sunlight cannot penetrate very far under water. Sunlight is needed for photosynthesis. So the depth of water determines whether photosynthesis is possible. There is enough sunlight for photosynthesis only in the photic zone. Q: The lighter photic zone and darker aphotic zone are determined by what? Choices: - water reflection - water shape - water density - water depth A:
water depth
Q: Answer the following question given this paragraph: Under the right pressure conditions, lowering the temperature of a substance in the liquid state causes the substance to solidify. The opposite effect occurs if the temperature is increased. Q: What happens to a substance in a liquid state when the temperate is lowed? Choices: - it melts - it evaporates - it dissipates - it solidifies A:
A: it solidifies
Question: Answer the following question given this paragraph: Q: What is vital for nervous system functions that include muscle stimulation, memory formation, and learning? Choices: - thiamine - glutamate - glycogen - acetylcholine A:
Answer: acetylcholine
*Question*
Answer the following question given this paragraph: Figure 9.11 The ends of linear chromosomes are maintained by the action of the telomerase enzyme. Q: The ends of linear chromosomes are maintained by the action of which enzyme? Choices: - cytokine - pepsin - insulin - telomerase A:
**Answer**
telomerase
*Question*
Answer the following question given this paragraph: Besides entertaining a cat, laser light has many other uses. It is used to scan bar codes, for example, and to carry communication signals in optical fibers. Optical fibers are extremely thin glass tubes that are used to guide laser light (see Figure below ). Sounds or pictures are encoded in pulses of laser light, which are then sent through an optical fiber. All of the light reflects off the inside of the fiber, so none of it escapes. As a result, the signal remains strong even over long distances. More than one signal can travel through an optic fiber at the same time, as you can see in Figure below . Optical fibers are used to carry telephone, cable TV, and Internet signals. Q: What do optical fibres look like? Choices: - square boxes - big flashlights - flat paper - thin glass tubes A:
**Answer**
thin glass tubes