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.
Answers: 1
Biology, 21.06.2019 15:00
Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?
Answers: 3
Biology, 22.06.2019 05:40
Why do we perceive objects as retaining their brightness under different lighting levels?
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Biology, 22.06.2019 10:30
In the desert, saguaro cacti, owls, horned lizards, and fire ants all share the same space. which of the following can be considered a population? question 9 options: all plants in the same area all cacti in the same area all species in the same area the lizards and the ants
Answers: 1
in his second experiment, what should he da different. in the same science fair, tina asks the quest...
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