<u>Answer</u>: b.)the seeing impaired may have more difficulty when crossing the street
When a person's vision is impaired, the other senses become more acute as they try to compensate the lack of vision. Thus, such persons rely heavily on hearing when navigating complex environments such as a city.
Due to the high amount of ambient noise specific to a metropolitan area, hybrid cars will me much more difficult to detect as they are more silent than their gasoline-powered counterparts.
Furthermore, a person with an impaired vision, may have never heard before the sound an hybrid car makes. Thus, even though they may hear the noise, they may fail to recognize it as a moving vehicle. Generally, the brain must go through a period of learning in which a specific sound is associated with a specific phenomenon or object. Hybrid cars as well as electric cars that are even more silent, may pose an unexpected danger to visually impaired persons.
Mutations result either from errors in DNA replication or from the damaging effects of mutagens, such as chemicals and radiation, which react with DNA and change the structures of individual nucleotides. All cells possess DNA-repair enzymes that attempt to minimize the number of mutations that occur
Plants gather water and nutrients/minerals from the ground through their roots as part of the process to produce food.
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Answer: The disease-fighting system uses these proteins to tell friendly cells from foreign (people or things who suddenly enter a place in an unwanted way). They are as (like nothing else in the world) as fingerprints. They play an important role in organ transplants.
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