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lions [1.4K]
2 years ago
13

Distinguish between manipulative experiments and natural experiments.

Biology
1 answer:
GuDViN [60]2 years ago
6 0
Manipulative experiments alter levels of a predictor variable (or factor), and then measures how one or more variables respond to these alterations. ... Natural experiments-An observational study in which we take advantage of natural variation that is present in the variable of interest.
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The site where the ureters enter the bladder is termed the _____ junction.
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<span>The vesicoureteric junction</span>
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Explanation:

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