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Verizon [17]
3 years ago
8

Tina asks the question "Does caffeine increase the heart rate of an earthworm?" In Test 1, she measures the heart rate by lookin

g at the earthworm under a microscopes, 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. The independent variable is
Biology
1 answer:
Greeley [361]3 years ago
7 0
The independent variable is the caffeine.
it controls the bpm.
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Explain the process of formation of complex proteins ​
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3 years ago
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Lyrx [107]

The sentence which should come next in the paragraph to maintain the compare contrast structure is, Gerbils have long furry tails, while hamsters do not have tails.

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Compare and contrast text structure is basically a type of structure where two things are compared and contrasted at the same time. In simple terms, comparison is finding the similarities whereas contrast means finding the differences.  

When it comes to Gerbils and hamsters, both these organism have many similarities. The only difference is in their tail. Gerbils have a very long and furry tail, hamsters on the other hand have a very short tail. Their tails are so short that one often find it difficult to notice its tail.

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