Answer the following question given this paragraph: Summary By far the most abundant element in the universe is hydrogen. The fusion of hydrogen nuclei to form helium nuclei is the major process that fuels young stars such as the sun. Elements heavier than helium are formed from hydrogen and helium in the interiors of stars. Successive fusion reactions of helium nuclei at higher temperatures create elements with even numbers of protons and neutrons up to magnesium and then up to calcium. Eventually, the elements up to iron-56 and nickel-58 are formed by exchange processes at even higher temperatures. Heavier elements can only be made by a process that involves multiple neutron-capture events, which can occur only during the explosion of a supernova. Q: What is the most abundant element in the universe? Choices: - oxygen - helium - fluoride - hydrogen A:
hydrogen
(Question)
Answer the following question given this paragraph: Prokaryotes have a wide range of metabolisms, and this determines where they live. They live in a particular habitat because they are able to "eat" whatever is around them. For example, there are bacteria and archaea that break down hydrogen sulfide to produce ATP. Hydrogen sulfide is the gas that gives rotten eggs and sewage their distinctive smell. It is poisonous to animals, but some prokaryotes depend on it for life. Q: What is the gas that gives rotten eggs and sewage their distinctive smell? Choices: - calcium sulfide - methane - hydrogen peroxide - hydrogen sulfide A:
(Answer)
hydrogen sulfide
Ques: Answer the following question given this paragraph: From the eighth week following fertilization until birth, the developing human being is called a fetus. Birth typically occurs at about 38 weeks after fertilization, so the fetal period generally lasts about 30 weeks. During this time, the organs complete their development. The fetus also grows rapidly in length and weight. Some of the specific changes that occur during the fetal stage are listed in Figure below . Q: Approximately how many weeks does the fetal period last? Choices: - 10 weeks - 25 weeks - 27 weeks - 30 weeks A:
Ans: 30 weeks
(Q).
Answer the following question given this paragraph: Q: Tissues of marine bony fishes gain what from their surroundings? Choices: - toxins - absorb salts - mercury - excess salts A:
(A).
excess salts
Ques:Answer the following question given this paragraph: Lipids are a class of biochemical compounds that living things use to store energy. Types of lipids include fats and oils. Q: What are a class of biochemical compounds that living things use to store energy? Choices: - hydrocarbons - proteins - calories - lipids A:

Ans:lipids
Answer the following question given this paragraph: The basic components of nucleic acids are nucleotides. A nucleotide is a molecule that contains a five-carbon sugar, a phosphate group, and a nitrogen containing base. The five-carbon sugar is either ribose, in the case of RNA, or deoxyribose, in the case of DNA. The only difference between the two molecules is the presence of a hydroxyl group attached to one member of the carbon ring in RNA. In DNA, that same carbon atom is attached only to a hydrogen atom (see Figure below ). Note that in drawing the structure of organic molecules, the single hydrogen atoms are not shown in the structure but are understood to be attached at each carbon point unless another molecule is shown. Q: What molecules with a nitrogen base are the basic components of nucleic acids? Choices: - sporozoans - enzymes - nuclides - nucleiotides A:
nucleiotides