*Question*
Q: Endoscopes are used to explore the body through various orifices or these? Read this paragraph and choose the correct option from the provided answers: Bundles of fibers can be used to transmit an image without a lens, as illustrated in Figure 25.15. The output of a device called an endoscope is shown in Figure 25.15(b). Endoscopes are used to explore the body through various orifices or minor incisions. Light is transmitted down one fiber bundle to illuminate internal parts, and the reflected light is transmitted back out through another to be observed. Surgery can be performed, such as arthroscopic surgery on the knee joint, employing cutting tools attached to and observed with the endoscope. Samples can also be obtained, such as by lassoing an intestinal polyp for external examination. Fiber optics has revolutionized surgical techniques and observations within the body. There are a host of medical diagnostic and therapeutic uses. The flexibility of the fiber optic bundle allows it to navigate around difficult and small regions in the body, such as the intestines, the heart, blood vessels, and joints. Transmission of an intense laser beam to burn away obstructing plaques in major arteries as well as delivering light to activate chemotherapy drugs are becoming commonplace. Optical fibers have in fact enabled microsurgery and remote surgery where the incisions are small and the surgeon's fingers do not need to touch the diseased tissue. Choices: - dermal tears - major incisions - ocular cavity - minor incisions A:
**Answer**
minor incisions

*Question*
Q: Alternation of generations is characteristic of the life cycle of all what? Read this paragraph and choose the correct option from the provided answers: All plants have a characteristic life cycle that includes alternation of generations. Asexual reproduction with spores produces a haploid gametophyte generation. Sexual reproduction with gametes and fertilization produces a diploid sporophyte generation. Choices: - cells - animals - organs - plants A:
**Answer**
plants

*Question*
Q: Where on earth do bacteria live? Read this paragraph and choose the correct option from the provided answers: Prokaryotes include Bacteria and Archaea. An individual prokaryote consists of a single cell without a nucleus. Bacteria live in virtually all environments on Earth. Archaea live everywhere on Earth, including extreme environments. Choices: - skin - water - blood - all environments A:
**Answer**
all environments

*Question*
Q: What chemical substances are secreted by animals that communicate by odor or taste? Read this paragraph and choose the correct option from the provided answers: Choices: - alaki - hormones - acids - pheromones A:
**Answer**
pheromones