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Which lymphoid organ is situated in the upper chest?

asked Jan 8 in Science by Hildegard086 (270 points)

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Which organ system defends the body from pathogens and other causes of disease?

asked Jan 8 in Science by PiperDelano3 (430 points)

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When does most amphibians' parenting end?

asked Jan 8 in Science by LuciaTapia1 (310 points)

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Which rule is a result of trends in energies and is useful in explaining why atoms form the ions that they do?

asked Jan 8 in Science by KellyeWooler (170 points)

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Where does an object gain or lose it's energy to during travel through a potential difference?

asked Jan 8 in Science by JacelynElsey (310 points)

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Which law states that a pair of alleles is separated, or segregated, during the formation of gametes?

asked Jan 8 in Science by JessJenkinso (490 points)

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Which latitudes get the most energy from the sun?

asked Jan 8 in Science by Jannette93D8 (170 points)

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Where does the small intestine begin?

asked Jan 8 in Science by CarlForan91 (250 points)

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When different types of tissues work together to perform a unique function, what do they form?

asked Jan 8 in Science by SanfordRobso (450 points)

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Where do polychaetes live?

asked Jan 8 in Science by SallyLarocqu (330 points)

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What type of tissue is blood?

asked Jan 8 in Science by EzekielMock0 (330 points)

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

asked Jan 8 in Science by WilliamsRpu6 (290 points)

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Which cycle is named after the scientist melvin calvin?

asked Jan 8 in Science by EloyHakala8 (270 points)

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Where do most ecosystems get their energy from?

asked Jan 8 in Science by RicoOff80362 (410 points)

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When both momentum and kinetic energy are conserved in a closed system, the collision is called what?

asked Jan 8 in Science by GaryLilley6 (250 points)

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Which important decomposers are known to live just about anywhere on earth?

asked Jan 8 in Science by IreneHqu7624 (130 points)

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What two lenses comprise a compound microscope?

asked Jan 8 in Science by BZBManual161 (410 points)

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Which type of natural disturbance in temperate grasslands, can be caused by a lightning strike?

asked Jan 8 in Science by CharissaOste (350 points)

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What waves require a material medium such as water, air, or rope?

asked Jan 8 in Science by MinervaElder (390 points)

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What type of numbers specify the arrangement of electrons in orbitals?

asked Jan 8 in Science by TaraFreeleag (430 points)

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