(Q).
Q: The main components of the circulatory system are the heart, blood vessels, and what else? Read this paragraph and choose the correct option from the provided answers: The circulatory system can be compared to a system of interconnected, one-way roads that range from superhighways to back alleys. Like a network of roads, the job of the circulatory system is to allow the transport of materials from one place to another. As described in Figure below , the materials carried by the circulatory system include hormones, oxygen, cellular wastes, and nutrients from digested food. Transport of all these materials is necessary to maintain homeostasis of the body. The main components of the circulatory system are the heart, blood vessels, and blood. Choices: - lungs - nerves - brain - blood A:
(A).
blood

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Q: The most common mode of asexual reproduction is through the formation of asexual these? Read this paragraph and choose the correct option from the provided answers: The most common mode of asexual reproduction is through the formation of asexual spores, which are produced by one parent only (through mitosis) and are genetically identical to that parent (Figure 24.8). Spores allow fungi to expand their distribution and colonize new environments. They may be released from the parent thallus either outside or within a special reproductive sac called a sporangium. Choices: - fibers - atoms - cells - spores A:
(A).
spores

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Q: Sounds or pictures can be encoded in pulses of what, which are then sent through an optical fiber? Read this paragraph and choose the correct option from the provided answers: Besides entertaining a cat, laser light has many other uses. One use is carrying communication signals in optical fibers. Sounds or pictures are encoded in pulses of laser light, which are then sent through an optical fiber. All of the light reflects off the inside of the fiber, so none of it escapes. As a result, the signal remains strong even over long distances. More than one signal can travel through an optical fiber at the same time, as you can see in the Figure below . Optical fibers are used to carry telephone, cable TV, and Internet signals. Choices: - kinetic energy - microwaves - quasars - laser light A:
(A).
laser light