The term wireless refers to a variety of technologies and devices, such as smartphones, computers, printers, headphones, and speakers. a wireless network uses waves to transmit signals. a) radio b) sound c) microwaves d) mechanical

The correct answer is option A: radio.

Explanation:

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The waves used by wireless networks are radio waves. Depending on the type of frequency is the type of wave used. In this case, the radio frequency is used for data transfer.

We conclude that the correct answer is option A: radio.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.