A student put an elodea plant in a test tube for 24 hours. For 12 hours, the
plant received light; for the next 12 hours, the plant was kept in the dark.
The student measured the pH in both conditions. Explain why the water
became acidic at highttime. (You may use the formula for photosynthesis:
6CO, + 6H 0 -- CH, 20. + 602.)
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Ответ:
Per the limited number of existing studies, certain chemicals in aloe vera may have skin-lightening properties. These chemicals are called aloin and aloesin. UV radiation — or sunlight — is a major cause of hyperpigmentation.