Ques:Q: Living things get energy from food in a process called respiration, which releases what gas back into the atmosphere? Read this paragraph and choose the correct option from the provided answers: Carbon doesn't stop there. Living things get energy from food in a process called respiration. This releases carbon dioxide back into the atmosphere. The cycle then repeats. Choices: - oxygen - hydrogen - nitrogen - carbon dioxide A:

Ans:carbon dioxide
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Ques: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? Read this paragraph and choose the correct option from the provided answers: 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. Choices: - cells - lipids - follicles - proteins A:

Ans:proteins
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Ques:Q: What are a class of biochemical compounds that living things use to store energy? Read this paragraph and choose the correct option from the provided answers: Lipids are a class of biochemical compounds that living things use to store energy. Types of lipids include fats and oils. Choices: - hydrocarbons - proteins - calories - lipids A:

Ans:lipids
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Ques:Q: How many protons do all atoms of a particular element have in their nuclei? Read this paragraph and choose the correct option from the provided answers: Choices: - varying number - three - zero - same number A:

Ans:
same number
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