Answer the following question given this paragraph: The placenta is a temporary organ that begins to form from the trophoblast layer of cells shortly after implantation. (For an animation showing how the placenta forms, go to link below. ) The placenta continues to develop and grow to meet the needs of the growing fetus. A fully developed placenta, like the one in Figure above , is made up of a large mass of blood vessels from both the mother and fetus. The maternal and fetal vessels are close together but separated by tiny spaces. This allows the mother's and fetus's blood to exchange substances across their capillary walls without the blood actually mixing. Q: What is the name of the temporary organ that begins to form from the trophoblast layer of cells shortly after implantation? Choices: - uterus - embryo - appendix - placenta A:
placenta
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Answer the following question given this paragraph: Most populations do not live under ideal conditions and grow logistically instead. Q: Because conditions are not ideal, most populations grow ____________. Choices: - historically - SOCIALLY - mathematically - logistically A:
logistically
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Answer the following question given this paragraph: The fuel rods are made of a corrosion-resistant alloy that encases the partially enriched uranium fuel; controlled fission of 235U in the fuel produces heat. Water surrounds the fuel rods and moderates the kinetic energy of the. Q: The fuel rods are made of a corrosion-resistant alloy that encases the partially enriched uranium fuel; controlled fission of 235u in the fuel produces heat. water surrounds the fuel rods and moderates this? Choices: - half-life - thermal energy - electromagnetism - kinetic energy A:
kinetic energy
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Answer the following question given this paragraph: Q: Centipedes have what on their foremost trunk segment, used to paralyze prey and aid in defense? Choices: - board claws - animal claws - diploid claws - poison claws A:
poison claws
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