Explain how the water in canals and irrigation ditches was controlled so that farmers could use it. (Site 1)

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20-11-2019
Biology

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Explain how the water in canals and irrigation ditches was controlled so that farmers could use it. (Site 1)

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ar0282673pdsamx ar0282673pdsamx · Answer 1 · 2021-01-15T21:38:26+01:00

In biology, specifically in terms of genetics and DNA, complementary means that the polynucleotide strand paired with the second polynucleotide strand has a nitrogenous base sequence that is the reverse complement, or the pair, of the other strand.Organisms need to detect and respond to changes in their internal and external environment. ... Cells called receptors , which detect stimuli (changes in the environment). The coordination centre, such as the brain, spinal cord or pancreas, which receives and processes information from receptors around the body.Hand no no kn please they dont happy they dont 2 at my fiff dns

liaanmilhem2 liaanmilhem2 · Answer 2 · 2021-02-17T14:04:44+01:00

Answer:

This answer is correct i got 100%

Explanation:

The two-tier ditch uses plants and microbes to trap soil and nutrients, keeping them out of the runoff water. The ditch also slows down the water flow. Overall, the water that leaves the two-tier ditch is cleaner than water from a standard ditch.Farming in arid and semi-arid climates is challenging. There’s no way a farmer can rely only on rainfall to water crops—there simply isn’t enough rain. Therefore, farmers must bring water to the crops. At first, ancient peoples would just carry water in buckets to water their fields. But this was time-consuming and hard work. Eventually they figured out that irrigation was more effective.