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Lady bird [3.3K]
2 years ago
15

Mrs. Lewis set up a lab for her biology students using a culture of the small crustacean Daphnia, obtained from a pond that was

20°C. The students are to investigate the effect temperature has on Daphnia. The students will observe the crustacean’s heartbeat under the microscope, at different temperatures, and count the number of heartbeats per sec. What is the independent variable in this experiment?
5 points
Biology
1 answer:
Drupady [299]2 years ago
5 0

Answer:

Hiii, the answer is b, hope this helped! :)

Explanation:

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