Answer the following question given this paragraph: Q: Behind the pupil, a single lens focuses light on a layer of what? Choices: - photons - chloroplasts - electrons - photoreceptors A:
photoreceptors
Answer the following question given this paragraph: Ceramics A ceramic is any nonmetallic, inorganic solid that is strong enough for use in structural applications. Traditional ceramics, which are based on metal silicates or aluminosilicates, are the materials used to make pottery, china, bricks, and concrete. Modern ceramics contain a much wider range of components and can be classified as either ceramic oxides, which are based on metal oxides such as alumina (Al2O3), zirconia (ZrO2), and beryllia (BeO), or nonoxide ceramics, which are based on metal carbides such as silicon carbide (carborundum, SiC) and tungsten carbide (WC), or nitrides like silicon nitride (Si 3N4) and boron nitride (BN). All modern ceramics are hard, lightweight, and stable at very high temperatures. Unfortunately, however, they are also rather brittle, tending to crack or break under stresses that would cause metals to bend or dent. Thus a major challenge for materials scientists is to take advantage of the desirable properties of ceramics, such as their thermal and oxidative stability, chemical inertness, and toughness, while finding ways to decrease their brittleness to use them in new applications. Few metals can be used in jet engines, for example, because most lose mechanical strength and react with oxygen at the very high operating. Q: What is any nonmetallic, inorganic solid that is strong enough for use in structural applications called? Choices: - tissue - metallic - glass - ceramic A:
ceramic
Q: Answer the following question given this paragraph: Enzymes are critical to the body's healthy functioning. They assist, for example, with the breakdown of food and its conversion to energy. In fact, most of the chemical reactions in the body are facilitated by enzymes. Q: Most of the chemical reactions in the body are facilitated by what? Choices: - proteins - vitamins - carbohydrates - enzymes A:
A: enzymes
Question: Answer the following question given this paragraph: Mouth Brooding. Some species of fish carry their fertilized eggs in their mouth until they hatch. This is called mouth brooding. If you look closely, you can see the eggs inside the mouth of the cardinalfish pictured here. Q: Some species of fish carry their fertilized eggs in their mouth until they hatch; this is called what? Choices: - internal reproduction - spawning - schooling - mouth brooding A:
Answer: mouth brooding
*Question*
Answer the following question given this paragraph: Cnidarians are aquatic invertebrates in Phylum Cnidaria. They include jellyfish and corals, both of which have radial symmetry. All cnidarians have nematocysts, and many are bioluminescent. They may exist in medusa and/or polyp form. Corals build hard exoskeletons that grow to become coral reefs. Q: Corals build hard exoskeletons that grow to become coral what? Choices: - beds - layers - crystals - reefs A:
**Answer**
reefs
Answer the following question given this paragraph: Plants are a large and varied group of organisms. There are close to 300,000 species of catalogued plants. Of these, about 260,000 are plants that produce seeds. Mosses, ferns, conifers, and flowering plants are all members of the plant kingdom. The plant kingdom contains mostly photosynthetic organisms; a few parasitic forms have lost the ability to photosynthesize. The process of photosynthesis uses chlorophyll, which is located in organelles called chloroplasts. Plants possess cell walls containing cellulose. Most plants reproduce sexually, but they also have diverse methods of asexual reproduction. Plants exhibit indeterminate growth, meaning they do not have a final body form, but continue to grow body mass until they die. Q: The process of photosynthesis uses chlorophyll, which is located in organelles called what? Choices: - fibroblasts - mitochondria - nucleus - chloroplasts A:
chloroplasts