Answer the following question given this paragraph: Strong acids completely transfer their acidic protons to the solvent when dissolved in water. When a weak acid is dissolved in water, most of the molecules will retain their acidic protons, and only a small percentage will dissociate. Q: When dissolved in water, what do strong acids transfer to the solvent completely? Choices: - acidic neutrons - acidic electrons - acidic proteins - acidic protons A:
acidic protons
(Question)
Answer the following question given this paragraph: Food Chains. These two food chains represent complex systems in nature. They make the systems easier to understand. These are simple conceptual models. Models of very complex systems are often based on mathematical equations or computer simulations. Q: What kind of tool, often based on mathematical equations or computer simulations, helps us understand complex systems? Choices: - levels - planes - panels - models A:
(Answer)
models
Ques: Answer the following question given this paragraph: Muscle contraction occurs when muscle fibers get shorter. Literally, the muscle fibers get smaller in size. To understand how this happens, you need to know more about the structure of muscle fibers. Q: What occurs when muscle fibers get shorter? Choices: - muscle extension - muscle tension - muscle diffusion - muscle contraction A:
Ans: muscle contraction
(Q).
Answer the following question given this paragraph: Reactivity is the ability of matter to combine chemically with other substances. Some kinds of matter are extremely reactive; others are extremely unreactive. For example, potassium is very reactive, even with water. When a pea-sized piece of potassium is added to a small amount of water, it reacts explosively. You can observe this reaction in the video at the URL below. ( Caution: Don't try this at home!) In contrast, noble gases such as helium almost never react with any other substances. Q: The ability of matter to combine chemically with other substances is known as? Choices: - turbidity - solubility - permeability - reactivity A:
(A).
reactivity
Ques:Answer the following question given this paragraph: The other idea is that evolution occurs by natural selection. Natural selection is the process in which living things with beneficial traits produce more offspring. As a result, their traits increase in the population over time. Q: Under which process do living things with beneficial traits produce more offspring? Choices: - migration - differentiation - evolution - natural selection A:

Ans:natural selection
Answer the following question given this paragraph: Sexual reproduction is more complicated. It involves two parents. Special cells called gametes are produced by the parents. A gamete produced by a female parent is generally called an egg . A gamete produced by a male parent is usually called a sperm . An offspring forms when two gametes unite. The union of the two gametes is called fertilization . You can see a human sperm and egg uniting in Figure below . The initial cell that forms when two gametes unite is called a zygote . Q: In sexual reproduction, what is the name of the gamete cell the male must contribute? Choices: - plasma - spore - ova - sperm A:
sperm