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Sveta_85 [38]
3 years ago
15

The main reason that it's important to test only one variable at a time is so that

Biology
2 answers:
OleMash [197]3 years ago
4 0
This is to make sure the test is reliable because it can happen that the two variables being tested affect each other skewing results
lozanna [386]3 years ago
3 0
Because if we're simultaneously moving/manipulating two different variables it can be very hard to determine why one variable is changing and why the other is changing. While this can be done with more complicated experimental designs, it usually is the case that scientists will only manipulate one variable and not two different ones. 
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Two cell organelles are described below.
matrenka [14]

Answer:

Organelle A is chloroplasts

Organelle B is the vacuole

Explanation:

I don’t exactly understand what it means on which one is correct, but I hope this helps you.

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2 years ago
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What is the job of ribosomes and mitochondria?
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The mitochondria produces energy to the cell while the ribosomes produce protei.

Explanation:

4 0
3 years ago
An organism has a metabolic pathway that is controlled by an inducer through negative regulation. When this organism is grown in
beks73 [17]

Answer:

The inducer will combines with the repressor and inactivates the pathway.

Explanation:

Inducer is a term in Molecular Biology, which represent a molecule or substance that has the capability to activate the transcription of a gene, where by it joins with and then inactivates a genetic repressor.

In other words, the inducer binds with the repressor in order to prevent the RNA polymerase to combine to the DNA, and chemically produce mRNA, this is done by repressor proteins combining with the DNA strand.

Inducer specifically makes repressor to change shapes, which will make it not combine with the DNA, and therefore, allow formation of transcription, such that expression of gene will eventually occur.

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3 years ago
One piece of evidence for the endosymbiotic theory is that the mitochondria and chloroplasts of eukaryotes _____.. . A.self-repl
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<span> D.all of the above

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Mitochondria and chloroplasts have striking similarities to bacteria cells. They have their own DNA, which is separate from the DNA found in the nucleus of the cell. And both organelles use their DNA to produce many proteins and enzymes required for their function. A double membrane surrounds both mitochondria and chloroplasts, further evidence that each was ingested by a primitive host. The two organelles also reproduce like bacteria, replicating their own DNA and directing their own division.


6 0
3 years ago
How are the products of protein hydrolysis by an aminopeptidase used in metabolism?
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