*Question*
Answer the following question given this paragraph: What is physics ? Physics is the branch of science that studies the physical world, including objects as small as subatomic particles and as large as galaxies. It studies the nature of matter and energy and how they interact. Physicists are inquisitive people who want to know the causes of what they see. How does the moon move? Why does the moon move? Why do the stars shine? Why do your hands get warm when you rub them together? Physicists, like all scientists, hope to find explanations that describe more than one phenomenon and offer a better understanding of how the universe works. Q: What is the branch of science that studies the physical world? Choices: - social science - botany - Ecology - physics A:
**Answer**
physics

*Question*
Answer the following question given this paragraph: Viruses are classified on the basis of several traits. For example, they may be classified by capsid shape, presence or absence of an envelope, and type of nucleic acid. Most systems of classifying viruses identify at least 20 virus families. Table below shows four examples of virus families and their traits. Have any of these viruses made you sick?. Q: Lampreys use their sucker to feed on what part of other fish species? Choices: - heart - brain - liver - blood A:
**Answer**
blood

*Question*
Answer the following question given this paragraph: Q: Although it is not vital to humans, calcitonin is important for calcium homeostasis in adults of some species in what group characterized by backbones? Choices: - mammals - reptiles - invertebrates - vertebrates A:
**Answer**
vertebrates

*Question*
Answer the following question given this paragraph: Natural Selection for a Polygenic Trait. Natural selection may affect the distribution of a polygenic trait. These graphs show three ways this can happen. Q: What evolutionary process may affect the distribution of a polygenic trait? Choices: - artificial selection - flow selection - characteristic selection - natural selection A:
**Answer**
natural selection