Acetylcholine (ACh)
Acetylcholine is an organic chemical that functions in the brain and body of many types of animals as a neurotransmitter.
Answer:
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In order to conduct a research you should have an dependent variable, independent variable and the control variable. so in order to study phototropism, then you should need sun light and the growth of the plant and you must have a control that why you need a dark room.
Answer:
Plants produce oxygen during photosynthesis, and they also need oxygen gas from the air for cellular respiration
Explanation:
Our hands have oils that will change the polarities of the substances when doing the chromatography. Since the purpose<span> of chromatography is to separate the compounds in a mixture we would end up with altered results.</span> The same goes for getting the paper wet.
