Answer the following question given this paragraph: Cooperation between Bacteria and Eukaryotes: Nitrogen Fixation Nitrogen is a very important element to living things, because it is part of nucleotides and amino acids that are the building blocks of nucleic acids and proteins, respectively. Nitrogen is usually the most limiting element in terrestrial ecosystems, with atmospheric nitrogen, N2, providing the largest pool of available nitrogen. However, eukaryotes cannot use atmospheric, gaseous nitrogen to synthesize macromolecules. Fortunately, nitrogen can be "fixed," meaning it is converted into ammonia (NH3) either biologically or abiotically. Abiotic nitrogen fixation occurs as a result of lightning or by industrial processes. Biological nitrogen fixation (BNF) is exclusively carried out by prokaryotes: soil bacteria, cyanobacteria, and Frankia spp. (filamentous bacteria interacting with actinorhizal plants such as alder, bayberry, and sweet fern). After photosynthesis, BNF is the second most important biological process on Earth. The equation representing the process is as follows. Q: Nitrogen is a very important element to living things, because it is part of nucleotides and amino acids that are the building blocks of nucleic acids and these? Choices: - cells - lipids - follicles - proteins A:
proteins
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Answer the following question given this paragraph: Conduct experiments or make observations to test the hypothesis. Q: How do you test a hypothesis? Choices: - write things on paper - ask a co-worker about it - think of how they would work - conduct experiments A:
conduct experiments
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Answer the following question given this paragraph: Inductive reasoning involves reaching conclusions about unobserved things on the basis of what has already been observed. Induction is used regularly in fields such as archaeology, where inferences about the past from present are made. Inductions could also be made across outer space, as in astronomy, where conclusions about the whole universe are drawn from the limited number of observations we are able to make. Q: Reaching conclusions about unobserved things on the basis of what has already been observed is known as what kind of reasoning? Choices: - primitive - reductive - conductive - inductive A:
inductive
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Answer the following question given this paragraph: Each kidney is supplied by a renal artery and renal vein. Q: Each kidney is supplied by a renal artery and what else? Choices: - spinal cord - brain vein - coronary artery - renal vein A:
renal vein
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