Ques: Answer the following question given this paragraph: Earth is just a tiny speck in the Universe. Our planet is surrounded by lots of space. Light travels across empty space. Light is the visible part of the electromagnetic spectrum . Astronomers use the light and other energy that comes to us to gather information about the Universe. Q: What is the term for the visible part of the electromagnetic spectrum? Choices: - chroma - gravity - electricity - light A:
Ans: light

Ques: Answer the following question given this paragraph: Water and carbon dioxide molecules are reactants in the process of photosynthesis. Does this mean they are "food" for plants, algae, and blue-green bacteria? Use the definition of "food" to answer this question. Q: Water and carbon dioxide molecules are reactants in what plant process? Choices: - digestion - breathing - glycolysis - photosynthesis A:
Ans: photosynthesis

Ques: Answer the following question given this paragraph: Phagocytosis is the process by which large particles, such as cells, are taken in by a cell. For example, when microorganisms invade the human body, a type of white blood cell called a neutrophil removes the invader through this process, surrounding and engulfing the microorganism, which is then destroyed by the neutrophil (Figure 3.26). A variation of endocytosis is called pinocytosis. This literally means "cell drinking" and was named at a time when the assumption was that the cell was purposefully taking in extracellular fluid. In reality, this process takes in solutes that the cell needs from the extracellular fluid (Figure 3.26). A targeted variation of endocytosis employs binding proteins in the plasma membrane that are specific for certain substances (Figure 3.26). The particles bind to the proteins and the plasma membrane invaginates, bringing the substance and the proteins into the cell. If passage across the membrane of the target of receptor-mediated endocytosis is ineffective, it will not be removed from the tissue fluids or blood. Instead, it will stay in those fluids and increase in concentration. Some human diseases are caused by a failure of receptor-mediated endocytosis. For example, the form of cholesterol termed low-density lipoprotein or LDL (also referred to as "bad" cholesterol) is removed from the blood by receptormediated endocytosis. In the human genetic disease familial hypercholesterolemia, the LDL receptors are defective or missing entirely. People with this condition have life-threatening levels of cholesterol in their blood, because their cells cannot clear the chemical from their blood. Q: What is the process by which large particles, such as cells, are taken in by a cell? Choices: - active transport - diffusion - mitosis - phagocytosis A:
Ans: phagocytosis

Ques: Answer the following question given this paragraph: 30.5 Applications of Atomic Excitations and De-Excitations 30. Figure 30.39 shows the energy-level diagram for neon. (a) Verify that the energy of the photon emitted when neon goes from its metastable state to the one immediately below is equal to 1.96 eV. (b) Show that the wavelength of this radiation is 633 nm. (c) What wavelength is emitted when the neon makes a direct transition to its ground state? 31. A helium-neon laser is pumped by electric discharge. What wavelength electromagnetic radiation would be needed to pump it? See Figure 30.39 for energy-level information. Ruby lasers have chromium atoms doped in an aluminum oxide crystal. The energy level diagram for chromium in a ruby is shown in Figure 30.64. What wavelength is emitted by a ruby laser?. Q: A desmosome is a cell structure that anchors the ends of what fibers together? Choices: - skeletal muscle - controllable muscle - smooth muscle - cardiac muscle A:
Ans:
cardiac muscle