Answer the following question given this paragraph: symbols are the values for antiquarks. B is baryon number, S is strangeness, c is charm, b is bottomness, t is topness. Values are approximate, are not directly observable, and vary with model. Q: Strangeness, charm, bottomness, and topness are properties of what subatomic particle? Choices: - pion - dark matter - molecules - quarks A:
quarks
(Question)
Answer the following question given this paragraph: Organisms that are obligate aerobes need oxygen to live. That is, they use oxygen as a terminal electron acceptor while making ATP (see the "Cellular Respiration" concept). Humans are obligate aerobes, and so are Mycobacterium tuberculosis bacteria. M. tuberculosis causes tuberculosis (TB). Obligate aerobes are found only in places with molecular oxygen. Q: What do obligate aerobes need to live? Choices: - blood - acid - dioxide - oxygen A:
(Answer)
oxygen
Ques: Answer the following question given this paragraph: Geologists say that the Grand Canyon ( Figure above ) has "layer cake geology. " This is because the rock strata are in layers. They are extremely easy to see. Sedimentary rocks are like a book that tells the story of the environment in which they formed. Rock units can be traced across large expanses. Looking down into the Grand Canyon, you get a sense of the vastness of space and of time. Q: What is stacked in layers in "layer cake geology"? Choices: - sediment - soil - horizontal stata - rock stata A:
Ans: rock stata
(Q).
Answer the following question given this paragraph: The Human Digestive System The process of digestion begins in the mouth with the intake of food (Figure 16.4). The teeth play an important role in masticating (chewing) or physically breaking food into smaller particles. The enzymes present in saliva also begin to chemically break down food. The food is then swallowed and enters the esophagusa long tube that connects the mouth to the stomach. Using peristalsis, or wave-like smooth-muscle contractions, the muscles of the esophagus push the food toward the stomach. The stomach contents are extremely acidic, with a pH between 1.5 and 2.5. This acidity kills microorganisms, breaks down food tissues, and activates digestive enzymes. Further breakdown of food takes place in the small intestine where bile produced by the liver, and enzymes produced by the small intestine and the pancreas, continue the process of digestion. The smaller molecules are absorbed into the blood stream through the epithelial cells lining the walls of the small intestine. The waste material travels on to the large intestine where water is absorbed and the drier waste material is compacted into feces; it is stored until it is excreted through the anus. Q: In the mouth, enzymes present in what begin to chemically break down food? Choices: - blood - acid - lymph - saliva A:
(A).
saliva
Ques:Answer the following question given this paragraph: The color of soil indicates its fertility. Black or dark brown soils are rich in nitrogen and contain a high percentage of organic materials. Soils that are nitrogen poor and low in organic material might be gray, yellow, or red ( Figure below ). Soil with low organic material is not good for growing plants. Q: What does the color of soil indicate? Choices: - temperature - chemical makeup - density - fertility A:

Ans:fertility
Answer the following question given this paragraph: Sponges reproduce both asexually and sexually. Asexual reproduction occurs by budding. Figure below shows the sponge life cycle when sexual reproduction is involved. Adult sponges produce eggs and sperm. In many species, the same individuals produce both. However, they don't produce eggs and sperm at the same time. As a result, self-fertilization is unlikely to occur. What is an advantage of avoiding self-fertilization?. Q: Asexual reproduction occurs by what process? Choices: - mating - balancing - ripening - budding A:
budding