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While spermatogenesis produces four haploid sperm cells, oogenesis produces one mature what?

asked Jan 8 in Science by LilaGlauert6 (230 points)

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While some climate regions have multiple layers, arid regions are poor for development of what?

asked Jan 8 in Science by PedroLeitch (440 points)

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asked Jan 8 in Science by ChiquitaKoso (290 points)

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While normal light microscopes can magnify objects up to about 1,500 times, what advanced instruments can magnify objects up to 1,000,000 times?

asked Jan 8 in Science by NestorSeccom (410 points)

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While most mammals give birth to live young, monotremes can do what?

asked Jan 8 in Science by Michal88L640 (430 points)

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While matter is recycled, ecosystems need a constant input of what?

asked Jan 8 in Science by AmosDeBernal (350 points)

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While light travels at different speeds in different kinds of matter, the speed of light is constant in what condition?

asked Jan 8 in Science by CharlineBayn (490 points)

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While in the lungs, blood gives up carbon dioxide and picks up what element before returning to the heart?

asked Jan 8 in Science by InaGreenham0 (450 points)

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While components of a mixture can be separated by physical means, the components of a pure substance can only be broken down through what means?

asked Jan 8 in Science by EdmundoSever (210 points)

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While climate change in earth history was due to natural processes, what is primarily to blame for recent global warming?

asked Jan 8 in Science by OnitaKeller (290 points)

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Which zone is located below 200 meters from the surface?

asked Jan 8 in Science by Danielle4973 (330 points)

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Which word describes how an extracellular solution can change the volume of a cell by affecting osmosis?

asked Jan 8 in Science by TiffanySeeka (390 points)

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Which waves have the longest wavelengths but the least energy in the atmosphere?

asked Jan 8 in Science by EveretteSher (370 points)

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Which waterfall series is the largest on the planet?

asked Jan 8 in Science by AraBlakely00 (550 points)

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Which water from the equator mixes with cold water from the poles?

asked Jan 8 in Science by IolaLambrick (450 points)

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Which vitamin is made in the skin when it is exposed to sunlight?

asked Jan 8 in Science by MikkiNivison (450 points)

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Which virus causes cold sores?

asked Jan 8 in Science by OrlandoStLeo (450 points)

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Which vertebrates were the first with four limbs?

asked Jan 8 in Science by HoseaBeazley (210 points)

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Which vertebrae carry the greatest amount of body weight and are thus characterized by the large size and thickness of the vertebral body?

asked Jan 8 in Science by DamonAem377 (170 points)

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Which veins return oxygen-rich blood from the lungs to the heart?

asked Jan 8 in Science by Boris02W830 (290 points)

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