Answer the following question given this paragraph: Varves form in lakes covered by ice. Varves are useful to scientists for understanding climate. Q: Varves form in lakes covered by what? Choices: - coral reef - bridges - soot - ice A:
ice
Answer the following question given this paragraph: The process of producing mature sperm is called spermatogenesis . Sperm are produced in the seminiferous tubules of the testes and become mature in the epididymis . The entire process takes about 9 to 10 weeks. You can watch an animation of spermatogenesis at this link: http://wps. aw. com/bc_martini_eap_4/40/10469/2680298. cw/content/index. html . Q: The process of producing mature sperm is called what? Choices: - spermatosis - glycogenolysis - ketoacidosis - spermatogenesis A:
spermatogenesis
Q: Answer the following question given this paragraph: 2.3 Scientific method The scientific method is not a step by step, linear process. It is an intuitive process, a methodology for learning about the world through the application of knowledge. Scientists must be able to have an "imaginative preconception" of what the truth is. Scientists will often observe and then hypothesize the reason why a phenomenon occurred. They use all of their knowledge and a bit of imagination, all in an attempt to uncover something that might be true. A typical scientific investigation might go like so: You observe that a room appears dark, and you ponder why the room is dark. In an attempt to find explanations to this curiosity, your mind unravels several different hypotheses. One hypothesis might state that the lights are turned off. Another hunch might be that the room's lightbulb has burnt out. Worst yet, you could be going blind. To discover the truth, 10 11 12 13 14. Q: Scientists will often observe and then what the reason why a phenomenon occurred? Choices: - realize - normalize - theorize - hypothesize A:
A: hypothesize
Question: Answer the following question given this paragraph: Aerobic respiration , which takes place in the presence of oxygen, evolved after oxygen was added to Earth's atmosphere. This type of respiration is useful today because the atmosphere is now 21% oxygen. However, some anaerobic organisms that evolved before the atmosphere contained oxygen have survived to the present. Therefore, anaerobic respiration , which takes place without oxygen, must also have advantages. Q: Anaerobic respiration takes place without what? Choices: - nitrogen - movement - carbon - oxygen A:
Answer: oxygen
*Question*
Answer the following question given this paragraph: Weathering changes solid rock into sediments. Sediments are different sizes of rock particles. Boulders are sediments; so is gravel. At the other end, silt and clay are also sediments. Weathering causes rocks at the Earth's surface to change form. The new minerals that form are stable at the Earth's surface. Q: Which process causes rocks at the earth's surface to change form? Choices: - bleaching - remodeling - eroding - weathering A:
**Answer**
weathering
(Question)
Answer the following question given this paragraph: Introduction Breathing is an involuntary event. How often a breath is taken and how much air is inhaled or exhaled are tightly regulated by the respiratory center in the brain. Humans, when they aren't exerting themselves, breathe approximately 15 times per minute on average. Canines, like the dog in Figure 39.1, have a respiratory rate of about 1530 breaths per minute. With every inhalation, air fills the lungs, and with every exhalation, air rushes back out. That air is doing more than just inflating and deflating the lungs in the chest cavity. The air contains oxygen that crosses the lung tissue, enters the bloodstream, and travels to organs and tissues. Oxygen (O2) enters the cells where it is used for metabolic reactions that produce ATP, a high-energy compound. At the same time, these reactions release carbon dioxide (CO2) as a by-product. CO2 is toxic and must be eliminated. Carbon dioxide exits the cells, enters the bloodstream, travels back to the lungs, and is expired out of the body during exhalation. Q: What gas is expired out of the body during exhalation? Choices: - carbon monoxide - hydrogen - oxygen - carbon dioxide A:
(Answer)
carbon dioxide