Answer the following question given this paragraph: A laser is a device that produces a very focused beam of visible light of just one wavelength and color. Pulses of laser light carry communication signals through optical fibers. Q: A device that produces a very focused beam of visible light of just one wavelength and color is called? Choices: - mirror - microwave - prism - laser A:
laser
Answer the following question given this paragraph: Toxic heavy metals include mercury and lead. Mercury is used in some industrial processes. It is also found in fluorescent light bulbs. Lead was once widely used in gasoline, paint, and pipes. It is still found in some products. Q: Mercury and lead, which was once widely used in paint and gasoline, are examples of what type of metals? Choices: - gaseous heavy metals - alloys - sulfuric heavy metals - toxic heavy metals A:
toxic heavy metals
Q: Answer the following question given this paragraph: Magma forms deep beneath the Earth's surface. Rock melts below the surface under tremendous pressure and high temperatures. Molten rock flows like taffy or hot wax. Most magmas are formed at temperatures between 600 o C and 1300 o C ( Figure below ). Q: What flows like taffy or hot wax? Choices: - gas - water - sand dunes - molten rock A:
A: molten rock
Question: Answer the following question given this paragraph: Pearls are highly valued as gemstones. Most gemstones come from the Earth, but pearls come from living things. They are created by mollusks, such as oysters. Q: What gems are created by mollusks, such as oysters? Choices: - crystals - turquoise - diamonds - pearls A:
Answer: pearls
*Question*
Answer the following question given this paragraph: The cytoskeleton is a cellular "scaffolding" or "skeleton" that crisscrosses the cytoplasm. All eukaryotic cells have a cytoskeleton, and recent research has shown that prokaryotic cells also have a cytoskeleton. The eukaryotic cytoskeleton is made up of a network of long, thin protein fibers and has many functions. It helps to maintain cell shape. It holds organelles in place, and for some cells, it enables cell movement. The cytoskeleton also plays important roles in both the intracellular movement of substances and in cell division. Certain proteins act like a path that vesicles and organelles move along within the cell. The threadlike proteins that make up the cytoskeleton continually rebuild to adapt to the cell's constantly changing needs. Three main kinds of cytoskeleton fibers are microtubules, intermediate filaments, and microfilaments. Q: What is the term for a cellular "scaffolding" that crisscrosses the cytoplasm? Choices: - protoskeleton - cellulose - collagen - cytoskeleton A:
**Answer**
cytoskeleton
*Question*
Answer the following question given this paragraph: Reproduction of Green Algae Green algae reproduce both asexually, by fragmentation or dispersal of spores, or sexually, by producing gametes that fuse during fertilization. In a single-celled organism such as Chlamydomonas, there is no mitosis after fertilization. In the multicellular Ulva, a sporophyte grows by mitosis after fertilization. Both Chlamydomonas and Ulva produce flagellated gametes. Q: In a single-celled organism such as chlamydomonas, there is no what after fertilization? Choices: - germination - spawning - meiosis - mitosis A:
**Answer**
mitosis