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vodka [1.7K]
2 years ago
12

Q

Biology
1 answer:
Inessa05 [86]2 years ago
6 0

Answer:

A

D

Explanation:

mark me brainliest even if im wrong but im positive im right

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The mouth of the shark is part of which organ system?
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mamaluj [8]

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During an investigation, Sam observes the number of hummingbirds that come to his large bird feeder at different times of day. H
mina [271]
The answer is <span>Time is the independent variable, and the number of birds is the dependent variable. </span>

<span>An independent variable is variable that is not affected in the experiment. It is what experimenter controls. On the other side, a dependent variable is called dependent because it depends on the independent variables. It is what is affected during the experiment.
In Sam investigation, he controls time - he counts birds at 6 a.m. and 6 p.m. So, time is the independent variable. The number of birds is affected during the experiment, so it must be the dependent variable.

</span>
3 0
3 years ago
Read 2 more answers
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