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Questions in health

[Done] ________ is the process that takes place when DNA makes a copy of itself. (11 letters)

[Done] Which of the following is part of a bacterial cell? A. a cell wall B. lysosomes C. mitochondria D. a nucleus

[Done] Which of the following do groups of different tissues form? A. organ B. organelle C. organ system D. organism

[Done] This gas makes up close to one-fourth of the air surrounding Earth.

[Done] 16. The main reason self-confidence is important in human relations is because:

[Done] Experts agree that the minimum time period for cardiorespiratory benefit from exercise is _______ minutes. A. 20 B. 10 C. 60 D. 30

[Done] Some people prefer interval training because A. the intensity of the exercise doesn't increase, only the time does. B. they can exercise at a steady, but slow, pace for longer periods of time. C. it's performed with speed and may not cause boredom. D. they've found that this type of training is best for beginners.

[Done] Humans always have a negative impact on the environment. A. True B. False

[Done] The study of the natural processes that occur in the environment and affect humans is called ____.

[Done] What would happen to a cell if the cell membrane were solid and waterproof?