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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 AlejandraTra (290 points)

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When the wind deposits sand, it forms small hills, what are these hills called?

asked Jan 8 in Science by MargretSheph (270 points)

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Whether the organism is a bacterium, plant, or animal, all living things access energy by breaking down these?

asked Jan 8 in Science by JoanneKinsel (250 points)

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Which country is formed by a hotspot along the mid-atlantic ridge?

asked Jan 8 in Science by PenniLoane3 (490 points)

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Which type of substance is considered a proton donor in a reaction?

asked Jan 8 in Science by EldonBarwell (250 points)

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What type of orbit do the planets make in the solar system?

asked Jan 8 in Science by HamishWrench (270 points)

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Which part of the nerve cell helps transmit nerve impulses?

asked Jan 8 in Science by Chester57770 (530 points)

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What waves are the broad range of electromagnetic waves with the longest wavelengths and lowest frequencies?

asked Jan 8 in Science by Jared68B4314 (290 points)

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What type of speciation occurs when groups from the same species are geographically isolated for long periods?

asked Jan 8 in Science by KellyManessi (310 points)

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Where is the most significant connection between the cerebellum and the rest of the brain?

asked Jan 8 in Science by MiraBanning (310 points)

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Where is the food supply and embryo stored in a seed?

asked Jan 8 in Science by KellyH19942 (480 points)

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What was the first mass extinction that occurred on earth?

asked Jan 8 in Science by KarenSamson (430 points)

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What travels at a rate of 300,000 kilometers per second, or nearly instantaneously?

asked Jan 8 in Science by NorrisWoffor (510 points)

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Which parasite causes downy mildew in grape plants?

asked Jan 8 in Science by LinneaGoodma (430 points)

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Where can composite volcanoes most frequently be found?

asked Jan 8 in Science by NorrisWoffor (510 points)

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What is the term for land that has permanently frozen soil?

asked Jan 7 in Science by ChantalG7628 (370 points)

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What type of metal is a good conductor of electricity?

asked Jan 8 in Science by CharoletteTo (530 points)

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What type of cells are gametes?

asked Jan 8 in Science by ThadRenner40 (450 points)

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When a solution freezes, only what particles come together to form a solid phase, while the presence of solute particles interferes with that process?

asked Jan 8 in Science by Mandy1426166 (630 points)

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What occurs when two waves combine and cancel each other out?

asked Jan 7 in Science by Shirley96X3 (290 points)

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