Natural selection (survival of the fittest basically)
Answer:
Diet is limiting oneself in foods and calories for several days or weeks. As a result, overweight is rapidly leaving, but once you return to your previous lifestyle, as extra pounds return, and getting rid of them becomes more difficult.
Proper nutrition is a complete balanced everyday diet, in which all necessary products must be present: meat, cereals, dairy products, fruits, vegetables. Eating healthy and balanced all the time not only strengthens the body but also helps to lose weight. It is known that an organism that does not regularly receive all the necessary substances begins to "junk".
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If an experiment is not verifiable, the person doing the experiment would never be able to get the answer to their hypothesis. Hypotheses need to be testable.
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Answer:
the enzyme and substrate fit together like a lock and key.