Answer the following question given this paragraph: the history of galactic evolution has been, and the nature of space in their vicinity. However, so many black holes are now known that correlations between black hole mass and galactic nuclei characteristics are being studied. What is the mechanism for the energy output of quasars? These distant and extraordinarily energetic objects now seem to be early stages of galactic evolution with a supermassive black-hole-devouring material. Connections are now being made with galaxies having energetic cores, and there is evidence consistent with less consuming, supermassive black holes at the center of older galaxies. New instruments are allowing us to see deeper into our own galaxy for evidence of our own massive black hole. Q: What distant and extraordinarily energetic objects now seem to be early stages of galactic evolution with a supermassive black-hole-devouring material? Choices: - pulsars - stars - neutrinos - quasars A:
quasars
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Answer the following question given this paragraph: If more NH 3 were added, the reverse reaction would be favored. This "favoring" of a reaction means temporarily speeding up the reaction in that direction until equilibrium is reestablished. Recall that once equilibrium is reestablished, the rates of the forward and reverse reactions are again equal. The addition of NH 3 would result in increased formation of the reactants, N 2 and H 2 . Q: What's it called when the reaction is sped up until equilibrium is established? Choices: - limiting - pushing - division - favoring A:
favoring
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Answer the following question given this paragraph: Blood vessels help regulate body processes by either constricting (becoming narrower) or dilating (becoming wider). These actions occur in response to signals from the autonomic nervous system or the endocrine system. Constriction occurs when the muscular walls of blood vessels contract. This reduces the amount of blood that can flow through the vessels (see Figure below ). Dilation occurs when the walls relax. This increases blood flows through the vessels. Q: What structures of the cardiovascular system help regulate body processes by either constricting or dilating? Choices: - muscles - cartilage - capillaries - blood vessels A:
blood vessels
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Answer the following question given this paragraph: All living thingseven the simplest life formshave a complex chemistry. Living things consist of large, complex molecules, and they also undergo many complicated chemical changes to stay alive. Thousands (or more) of these chemical reactions occur in each cell at any given moment. Metabolism is the accumulated total of all the biochemical reactions occurring in a cell or organism. Complex chemistry is needed to carry out all the functions of life. Q: What is the accumulated total of all the biochemical reactions occurring in a cell or organism called? Choices: - respiration - expansion - circulation - metabolism A:
metabolism
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