Q: What measure is resorted to by people who wish to screen out genetic abnormalities in the fetus? Read this paragraph and choose the correct option from the provided answers: A genetic disorder that is caused by a mutation can be inherited. Therefore, people with a genetic disorder in their family may be concerned about having children with the disorder. Professionals known as genetic counselors can help them understand the risks of their children being affected. If they decide to have children, they may be advised to have prenatal ("before birth") testing to see if the fetus has any genetic abnormalities. One method of prenatal testing is amniocentesis . In this procedure, a few fetal cells are extracted from the fluid surrounding the fetus, and the fetal chromosomes are examined. Choices: - contraceptive use - in vitro fertilization - stem cell therapy - prenatal testing A:
prenatal testing
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Q: Fish are a diverse and interesting group of organisms in what sub-phylum? Read this paragraph and choose the correct option from the provided answers: If the word fish makes you think of cute little goldfish in a tank, check out the anglerfish pictured in Figure below . It's also called a black sea devil. Surprisingly, goldfish and angler fish aren't all that different from each other as far as fish diversity goes. Both fish are placed in the same fish class. Clearly, fish are a diverse and interesting group of vertebrates. Choices: - mammals - invertebrates - organelles - vertebrates A:
vertebrates
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Q: What kind of water are cattails adapted for with narrow, strap-like leaves? Read this paragraph and choose the correct option from the provided answers: Living in water does present challenges to plants, however. For one thing, pollination by wind or animals isn't feasible under water, so aquatic plants may have adaptations that help them keep their flowers above water. For instance, water lilies have bowl-shaped flowers and broad, flat leaves that float. This allows the lilies to collect the maximum amount of sunlight, which does not penetrate very deeply below the water's surface. Plants that live in moving water, such as streams and rivers, may have different adaptations. For example, cattails have narrow, strap-like leaves that reduce their resistance to the moving water (see Figure below ). Choices: - stagnant water - saline water - turbulent water - moving water A:
moving water
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Q: What term refers to something supplied by nature that helps support life? Read this paragraph and choose the correct option from the provided answers: A natural resource is something supplied by nature that helps support life. When you think of natural resources, you may think of fossil fuels, like the coal in the coal field pictured in Figure below . However, sunlight, wind, soil, and living things are also important natural resources. Choices: - free resource - simple resource - existing resource - natural resource A:
natural resource
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