It is important because the results would not be reliable since other variables you are not testing could have been in affect.
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Answer:
He should make identical stains on T-shirts and see whether different parts of the lemon will remove the stain
Explanation:
Plant and animal cells both undergo mitotic cell divisions. Their main difference is how they form the daughter cells during cytokinesis. During that stage, animal cells form furrow or cleavage that gives way to formation of daughter cells. Due to the existence of the rigid cell wall, plant cells don't form furrows.
D climate change is a serious issue. we need to make a change