Answer the following question given this paragraph: After cells differentiate, all the major organs begin to form during the remaining weeks of embryonic development. A few of the developments that occur in the embryo during weeks 4 through 8 are listed in Figure below . As the embryo develops, it also grows in size. By the eighth week of development, the embryo is about 30 millimeters (just over 1 inch) in length. It may also have begun to move. Q: During which stage of development do all the major organs begin to form? Choices: - third trimester - nascent - transgenic - embryonic A:
embryonic
(Question)
Answer the following question given this paragraph: In food chemistry, the substances known as antioxidants are reducing agents. Ascorbic acid (vitamin C; C6H8O6) is thought to retard potentially damaging oxidation of living cells. In the process, it is oxidized to dehydroascorbic acid (C6H6O6). In the stomach, ascorbic acid reduces the nitrite ion (NO2) to nitric oxide (NO): C6H8O6 + 2H+ + 2NO2 C6H6O6 + 2H2O + 2NO If this reaction did not occur, nitrite ions from foods would oxidize the iron in hemoglobin, destroying its ability to carry oxygen. Tocopherol (vitamin E) is also an antioxidant. In the body, vitamin E is thought to act by scavenging harmful by-products of metabolism, such as the highly reactive molecular fragments called free radicals. In foods, vitamin E acts to prevent fats from being oxidized and thus becoming rancid. Vitamin C is also a good antioxidant. Finally, and of greatest importance, green plants carry out the redox reaction that makes possible almost all life on Earth. They do this through a process calledphotosynthesis, in which carbon dioxide and water are converted to glucose (C6H12O6). The synthesis of glucose requires a variety of proteins called enzymes and a green pigment called chlorophyll that converts sunlight into chemical energy (Figure 5.7 "Life on Earth"). The overall change that occurs is as follows:. Q: Photosynthesis converts carbon dioxide and water into what? Choices: - insulin - carbon - glutamate - glucose A:
(Answer)
glucose
Ques: Answer the following question given this paragraph: Flowers are the reproductive organs of plants. Each pea plant flower has both male and female parts. The anther is part of the stamen, the male structure that produces male gametes (pollen). The stigma is part of the pistil, the female structure that produces female gametes and guides the pollen grains to them. The stigma receives the pollen grains and passes them to the ovary, which contains female gametes. Q: What female flower structure, which is part of the pistil, receives the pollen grains and passes them to the ovary? Choices: - sepal - style - ovary - stigma A:
Ans: stigma
(Q).
Answer the following question given this paragraph: Continental glaciers are large ice sheets that cover relatively flat ground. These glaciers flow outward from where the greatest amounts of snow and ice accumulate. Q: What are large sheets of ice that cover relatively flat ground called? Choices: - land glaciers - cellular glaciers - rocky glaciers - continental glaciers A:
(A).
continental glaciers
Ques:Answer the following question given this paragraph: Humidity is the amount of water vapor in the air. Humidity varies from place to place. It also varies in the same place from season to season. On a summer day in Atlanta, Georgia, humidity is high. The air feels very heavy and sticky. On a winter day in Flagstaff, Arizona, humidity is low. The air sucks moisture out of your nose and lips. Humidity can change rapidly if a storm comes in. Humidity can vary over a short distance, like near a lake. Even when humidity is at its highest, water vapor makes up only about 4% of the atmosphere. Q: What is the name for the amount of water vapor in the air? Choices: - ambient - heat - viscosity - humidity A:

Ans:humidity
Answer the following question given this paragraph: Muscles can only contract. They cannot actively extend, though they can move or relax back into the non-contracted neutral position. Therefore, to move bones in opposite directions, pairs of muscles must work in opposition. Each muscle in the pair works against the other to move bones at the joints of the body. The muscle that contracts to cause a joint to bend is called the flexor . The muscle that contracts to cause the joint to straighten is called the extensor . When one muscle is contracted, the other muscle from the pair is always elongated. Q: What is the name of the muscle that contracts to cause the joint to straighten? Choices: - flexor - abductor - opposing - extensor A:
extensor