Question: Q: Which radio frequency should you listen to if you want less noise? Read this paragraph and choose the correct option from the provided answers: FM radio is inherently less subject to noise from stray radio sources than AM radio. The reason is that amplitudes of waves add. So an AM receiver would interpret noise added onto the amplitude of its carrier wave as part of the information. An FM receiver can be made to reject amplitudes other than that of the basic carrier wave and only look for variations in frequency. It is thus easier to reject noise from FM, since noise produces a variation in amplitude. Television is also broadcast on electromagnetic waves. Since the waves must carry a great deal of visual as well as audio information, each channel requires a larger range of frequencies than simple radio transmission. TV channels utilize frequencies in the range of 54 to 88 MHz and 174 to 222 MHz. (The entire FM radio band lies between channels 88 MHz and 174 MHz. ) These TV channels are called VHF (for very high frequency). Other channels called UHF (for ultra high frequency) utilize an even higher frequency range of 470 to 1000 MHz. The TV video signal is AM, while the TV audio is FM. Note that these frequencies are those of free transmission with the user utilizing an old-fashioned roof antenna. Satellite dishes and cable transmission of TV occurs at significantly higher frequencies and is rapidly evolving with the use of the high-definition or HD format. Choices: - am - wave - cb - fm A:
Answer: fm

Question: Q: In addition to five classes of fish, what other classes make up the species of vertebrates? Read this paragraph and choose the correct option from the provided answers: There are about 50,000 living species of vertebrates. They are placed in nine classes: five classes of fish plus amphibians, reptiles, birds, and mammals. Choices: - amphibians , vertebrae , birds , and mammals - reptiles, birds, mammals, and primates - insects, amphibians, reptiles, and birds - amphibians, reptiles, birds, and mammals A:
Answer: amphibians, reptiles, birds, and mammals

Question: Q: Most members of the animal kingdom have differentiated tissues of four main classesnervous, muscular, connective, and this? Read this paragraph and choose the correct option from the provided answers: ingest their food and usually develop into motile creatures with a fixed body plan. Most members of the animal kingdom have differentiated tissues of four main classesnervous, muscular, connective, and epithelialthat are specialized to perform different functions. Most animals reproduce sexually, leading to a developmental sequence that is relatively similar across the animal kingdom. Organisms in the animal kingdom are classified based on their body morphology and development. True animals are divided into those with radial versus bilateral symmetry. Animals with three germ layers, called triploblasts, are further characterized by the presence or absence of an internal body cavity called a coelom. Animals with a body cavity may be either coelomates or pseudocoelomates, depending on which tissue gives rise to the coelom. Coelomates are further divided into two groups called protostomes and deuterostomes, based on a number of developmental characteristics. Choices: - neural - crystalline - digestive - epithelial A:
Answer:
epithelial