Q: Answer the following question given this paragraph: Streams often start in mountains, where the land is very steep. You can see an example in Figure below . A mountain stream flows very quickly because of the steep slope. This causes a lot of erosion and very little deposition. The rapidly falling water digs down into the stream bed and makes it deeper. It carves a narrow, V-shaped channel. Q: Where do streams often start? Choices: - valleys - oceans - plains - mountains A:
A: mountains

Q: Answer the following question given this paragraph: Figure 16.17 The body contains three types of muscle tissue: skeletal muscle, smooth muscle, and cardiac muscle. Notice that skeletal muscle cells are long and cylindrical, they have multiple nuclei, and the small, dark nuclei are pushed to the periphery of the cell. Smooth muscle cells are short, tapered at each end, and have only one nucleus each. Cardiac muscle cells are also cylindrical, but short. The cytoplasm may branch, and they have one or two nuclei in the center of the cell. (credit: modification of work by NCI, NIH; scale-bar data from Matt Russell). Q: Name the three types of muscle tissue. Choices: - cardiac, smooth, long - smooth, long, tight - skeletal, cardiac, long - skeletal, smooth, cardiac A:
A: skeletal, smooth, cardiac

Q: Answer the following question given this paragraph: Figure 27.13 Animals that molt their exoskeletons, such as these (a) Madagascar hissing cockroaches, are in the clade Ecdysozoa. (b) Phoronids are in the clade Lophotrochozoa. The tentacles are part of a feeding structure called a lophophore. (credit a: modification of work by Whitney Cranshaw, Colorado State University, Bugwood. org; credit b: modification of work by NOAA). Q: Animals that molt their exoskeletons belong to which clade? Choices: - protists - spirogyra - trichina - ecdysozoa A:
A: ecdysozoa

Q: Answer the following question given this paragraph: Gas particles are in constant rapid motion in random directions . The fast motion of gas particles gives them a relatively large amount of kinetic energy. Recall that kinetic energy is the energy that an object possesses because of its motion. The particles of a gas move in straight-line motion until they collide with another particle or with one of the walls of its container. Q: The fast motion of gas particles gives them a relatively large amount of what energy? Choices: - residual energy - Potential energy - Chemical energy - kinetic energy A:
A: kinetic energy