(Question)
Q: What is the process by which plants gain energy and produce sugar? Read this paragraph and choose the correct option from the provided answers: 13 Photosynthesis 6 CO2 + 6 H2 O C6 H12 O6 + 6 O2 One of most important reactions in history of life: source of atmospheric O2 ultimately led to aerobic respiration and eukaryotes Responsible for bulk of glucose production Early experiments showed that mass of plant must be derived from substances in the air, not the soil Experiments with isotopes showed that liberated oxygen comes from water Experiments also showed that light is essential but that some reactions (e. , reduction of CO2 ) continue in the dark Plants do two big, important things during photosynthesis: gain energy (absorb light) and build sugar (glucose). Photosynthesis can be divided into two series of chemical reactions: the light (lightdependent) reactions and the dark (light-independent) reactions. In light reactions, light is absorbed; in dark reactions, sugar is built. Occurs when plants, algae, and autotrophic bacteria absorb light energy and build glucose. Choices: - glycolysis - respiration - chemosynthesis - photosynthesis A:
(Answer)
photosynthesis

(Question)
Q: What element once commonly used in paint and gasoline has now been found to have dangerous effects? Read this paragraph and choose the correct option from the provided answers: lead: An element that was once commonly used in gasoline and paint, is now found to have dangerous effects, such as brain damage. Lead contamination has many harmful effects on the body. Choices: - plastic - chromium - niacin - lead A:
(Answer)
lead

(Question)
Q: What is the term for the force exerted by circulating blood on the walls of blood vessels? Read this paragraph and choose the correct option from the provided answers: The force exerted by circulating blood on the walls of blood vessels is called blood pressure . Blood pressure is highest in arteries and lowest in veins. When you have your blood pressure checked, it is the blood pressure in arteries that is measured. High blood pressure, or hypertension , is a serious health risk but can often be controlled with lifestyle changes or medication. You can learn more about hypertension by watching the animation at this link: http://www. healthcentral. com/high-blood-pressure/introduction-47-115. html . Choices: - circulation pressure - heart pressure - blood energy - blood pressure A:
(Answer)
blood pressure