Answer the following question given this paragraph: When zinc reacts with hydrochloric acid, the reaction bubbles vigorously as hydrogen gas is produced. The production of a gas is also an indication that a chemical reaction is occurring. Q: What branch of biology focuses on heredity? Choices: - botany - cell biology - zoology - genetics A:
genetics
(Question)
Answer the following question given this paragraph: Biochemical reactions are optimal at physiological temperatures. For example, most biochemical reactions work best at the normal body temperature of 98.6F (37C). Many enzymes lose function at lower and higher temperatures. At higher temperatures, an enzyme's shape deteriorates, and only when the temperature comes back to normal does the enzyme regain its shape and normal activity. Q: Biochemical reactions are optimal at physiological temperatures because many what lose function at lower and higher temperatures? Choices: - hormones - carbohydrates - neurons - enzymes A:
(Answer)
enzymes
Ques: Answer the following question given this paragraph: The Tyndall effect is the scattering of visible light by colloidal particles. Q: The tyndall effect refers to the scattering of what by colloidal particles? Choices: - primary colors - dark matter - dust mites - visible light A:
Ans: visible light
(Q).
Answer the following question given this paragraph: Gravity is responsible for erosion by flowing water and glaciers. That's because gravity pulls water and ice downhill. These are ways gravity causes erosion indirectly. But gravity also causes erosion directly. Gravity can pull soil, mud, and rocks down cliffs and hillsides. This type of erosion and deposition is called mass wasting . It may happen suddenly. Or it may occur very slowly, over many years. Q: What force is responsible for erosion by flowing water and glaciers? Choices: - kinetic - electromagnetic - weight - gravity A:
(A).
gravity
Ques:Answer the following question given this paragraph: 20.8 End-of-Chapter Material Chapter Summary To ensure that you understand the material in this chapter, you should review the meanings of the bold terms in the following summary and ask yourself how they relate to the topics in the chapter. Metabolism is the general term for all chemical reactions in living organisms. The two types of metabolism are catabolismthose reactions in which complex molecules (carbohydrates, lipids, and proteins) are broken down to simpler ones with the concomitant release of energyand anabolismthose reactions that consume energy to build complex molecules. Metabolism is studied by looking at individual metabolic pathways, which are a series of biochemical reactions in which a given reactant is converted to a desired end product. The oxidation of fuel molecules (primarily carbohydrates and lipids), a process called respiration, is the source of energy used by cells. Catabolic reactions release energy from food molecules and use some of that energy for the synthesis of adenosine triphosphate (ATP); anabolic reactions use the energy in ATP to create new compounds. Catabolism can be divided into three stages. In stage I, carbohydrates, lipids, and proteins are broken down into their individual monomer unitssimple sugars, fatty acids, and amino acids, respectively. In stage II, these monomer units are broken down by specific metabolic pathways to form a common end product acetyl-coenzyme A (CoA). In stage III, acetyl-CoA is completely oxidized to form carbon dioxide and water, and ATP is produced. Saylor URL: http://www. saylor. org/books. Q: Catabolism and anabolism are the two types of what? Choices: - heart rate - cells - calcium - metabolism A:

Ans:metabolism
Answer the following question given this paragraph: CHAPTER SUMMARY 7.1 Sexual Reproduction Nearly all eukaryotes undergo sexual reproduction. The variation introduced into the reproductive cells by meiosis appears to be one of the advantages of sexual reproduction that has made it so successful. Meiosis and fertilization alternate in sexual life cycles. The process of meiosis produces genetically unique reproductive cells called gametes, which have half the number of chromosomes as the parent cell. Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition. Thus, sexually reproducing organisms alternate between haploid and diploid stages. However, the ways in which reproductive cells are produced and the timing between meiosis and fertilization vary greatly. There are three main categories of life cycles: diploid-dominant, demonstrated by most animals; haploid-dominant, demonstrated by all fungi and some algae; and alternation of generations, demonstrated by plants and some algae. Q: Sexually reproducing organisms alternate between which stages? Choices: - binary and diploid - binary and haploid - diploid and traploid - haploid and diploid A:
haploid and diploid