Answer the following question given this paragraph: called an alkaline battery when adapted to operate under alkaline conditions. Button batteries have a high output-to-mass ratio; lithiumiodine batteries consist of a solid electrolyte; the nickel cadmium (NiCad) battery is rechargeable; and the leadacid battery, which is also rechargeable, does not require the electrodes to be in separate compartments. A fuel cell requires an external supply of reactants as the products of the reaction are continuously removed. In a fuel cell, energy is not stored; electrical energy is provided by a chemical reaction. Q: In a fuel cell, energy is not stored; electrical energy is provided by what? Choices: - fusion reaction - carbon reaction - consumption reaction - chemical reaction A:
chemical reaction
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Answer the following question given this paragraph: 15.4 Mollusks and Annelids The phylum Mollusca is a large, mainly marine group of invertebrates. Mollusks show a variety of morphologies. Many mollusks secrete a calcareous shell for protection, but in other species, the shell is reduced or absent. Mollusks are protostomes. The dorsal epidermis in mollusks is modified to form the mantle, which encloses the mantle cavity and visceral organs. This cavity is distinct from the coelomic cavity, which the adult animal retains, surrounding the heart. Respiration is facilitated by gills known as ctenidia. A chitinous scraper called the radula is present in most mollusks. Mollusks are mostly dioecious and are divided into seven classes. The phylum Annelida includes worm-like, segmented animals. Segmentation is both external and internal, which is called metamerism. Annelids are protostomes. The presence of chitinous hairs called chaetae is characteristic of most members. These animals have well-developed nervous and digestive systems. Polychaete annelids have parapodia that participate in locomotion and respiration. Suckers are seen in the order Hirudinea. Breeding systems include separate sexes and hermaphroditism. Q: What do many mollusks secrete for their protection? Choices: - mucus - sedimentation shell - microscopic shell - calcareous shell A:
calcareous shell
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Answer the following question given this paragraph: The two smallest carboxylic acids are formic acid (found in the stingers of ants) and acetic acid (found in vinegar). Many organic compounds are considerably more complex than the examples described here. Many compounds, such as cholesterol discussed in the chapter-opening essay, contain more than one functional group. The formal names can also be quite complex. In http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gobch12through http://catalog. flatworldknowledge. com/bookhub/reader/2547 - gob-ch15, we will examine the characteristics and chemistry of other important organic compounds and functional groups. Q: The two smallest carboxylic acids are formic acid and what else? Choices: - carbonates acid - ethylene acid - ascorbic acid - acetic acid A:
acetic acid
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Answer the following question given this paragraph: The Cerebrum The iconic gray mantle of the human brain, which appears to make up most of the mass of the brain, is the cerebrum (Figure 13.6). The wrinkled portion is the cerebral cortex, and the rest of the structure is beneath that outer covering. There is a large separation between the two sides of the cerebrum called the longitudinal fissure. It separates the cerebrum into two distinct halves, a right and left cerebral hemisphere. Deep within the cerebrum, the white matter of the corpus callosum provides the major pathway for communication between the two hemispheres of the cerebral cortex. Q: The iconic gray mantle of the human brain, which appears to make up most of the mass of the brain, is called? Choices: - brain stem - lobes - thrombus - cerebrum A:
cerebrum
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