Biology, 28.08.2021 02:40 KingJayDevil
in his second experiment, what should he da different. in the same science fair, tina asks the question "does caffeine increase the heart rate of an earthworm?" in test 1, she measures the heart rate by looking at the earthworm under a microscope, the earthworm has a heart rate of 50 bpm (beats per minute). in test 2, she places a few drops of caffeine on the earthworm's skin and measures the rate again. in this test, the heart rate is 68 bpm.
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Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?
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Which of the following is not considered an appendage of the skin? nails glands follicles none of the above
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What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen
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Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer
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in his second experiment, what should he da different. in the same science fair, tina asks the quest...
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