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Scilla [17]
3 years ago
14

Why is it important to alter only one variable at a time when designing and experiment?

Biology
1 answer:
UkoKoshka [18]3 years ago
8 0

Answer: A variable within a scientific experiment is something that is changed (i.e. it varies). There should be only one manipulated variable within a scientific experiment so that the experimenter can be certain it is this variable which causes a pattern in the resultant data, if any exists at all.

Explanation:

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Which of the following statements about cells is true?
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All cells have dna.
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In a mark–recapture study to estimate the size of a rodent population, researchers catch and mark 30 individuals. Two days later
tatyana61 [14]

Answer: The estimated size of the population is 150

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N = (M × C)/R

where :

N = estimated number of individuals in the population

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C = total number captured the second time (with and without a mark)

R= number of individuals ecaptured (those with a mark)

So with this formula we can calculate an estimation of the population of rodents. Because there is no number of rodents captured the second time given, we will assume 30 was caught again, making the 20% found marked being 6. We calculate it as:

N = (M × C)/R

:N = ( 30 × 30)/ 6

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6 0
3 years ago
The key product of aerobic respiration, ________, shuts down the biochemical pathways of aerobic respiration when its levels are
Simora [160]

Answer:ATP/Feedback

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