All of the factors that can change in an experiment are called variables. Which of the following is true about the variables in an experiment? OA. One variable should be kept the same and at least two variables should change. OB. All variables should change. OC. All variables should be kept the same. OD One variable should change and the others should be kept the same.​

answer; hypnagogic sensations)

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answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

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: d

-charlie

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: d

trachea, alveoli, lung capillaries, arteries

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.