Answer the following question given this paragraph: The biosphere includes all living things within all of their environments. It includes every part of the environment where life exists, from the upper reaches of the atmosphere to the top few meters of soil, to the bottoms of the oceans. An ecosystem is made up of the relationships among smaller groups of organisms with each other, and with their environment. Scientists often speak of the interrelatedness of living things, because, according to evolutionary theory, organisms adapt to their environment, and they must also adapt to other organisms in that environment. Q: What includes all living things within all their environments, including everywhere life exists, from the upper atmosphere, to the top of the soil, to ocean bottoms? Choices: - biome - community - habitat - biosphere A:
biosphere
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Answer the following question given this paragraph: Rheumatic fever is caused by a virus that has antigens similar to molecules in human heart tissues. When the immune system attacks the virus, it may also attack the heart. What type of immune system disease is rheumatic fever? Explain your answer. Q: Name the fever that is caused by a virus that has antigens similar to molecules in human heart tissues. Choices: - Dengue fever - yellow fever - chronic fever - rheumatic fever A:
rheumatic fever
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Answer the following question given this paragraph: 12.7 Molecular Transport Phenomena: Diffusion, Osmosis, and Related Processes 62. You can smell perfume very shortly after opening the bottle. To show that it is not reaching your nose by diffusion, calculate the average distance a perfume molecule moves in one second in air, given its diffusion constant D to be 1.0010 6 m 2 /s . What is the ratio of the average distances that oxygen will diffuse in a given time in air and water? Why is this distance less in water (equivalently, why is D less in water)? 64. Oxygen reaches the veinless cornea of the eye by diffusing through its tear layer, which is 0.500-mm thick. How long does it take the average oxygen molecule to do this? 65. (a) Find the average time required for an oxygen molecule to diffuse through a 0.200-mm-thick tear layer on the cornea. 3 (b) How much time is required to diffuse 0.500 cm of oxygen to the cornea if its surface area is 1.00 cm 2 ? 66. Suppose hydrogen and oxygen are diffusing through air. A small amount of each is released simultaneously. How much time passes before the hydrogen is 1.00 s ahead of the oxygen? Such differences in arrival times are used as an analytical tool in gas chromatography. Q: Oxygen reaches what veinless part of the eye by diffusing through its tear layer? Choices: - retina - pupil - membranes - cornea A:
cornea
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Answer the following question given this paragraph: Water is recycled through the water cycle. The water cycle is the movement of water through the oceans, atmosphere, land, and living things. The water cycle is powered by energy from the Sun. Figure below diagrams the water cycle. Q: The water cycle is powered by energy from where? Choices: - atmosphere - earth - living things - sun A:
sun
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