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belka [17]
3 years ago
13

Why do we control the variables we are not investigating

Biology
2 answers:
Ber [7]3 years ago
8 0
I believe it is because it could lead to internal validity messing up the whole experiment
mario62 [17]3 years ago
6 0
I believe that it is if the control works as expected, it means that has run correctly, and the results are due to the effect of the variable being tested.
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We used the enzyme, taq polymerase, which is derived from the thermus aquaticus bacterium, in our pcr procedure. Why is this enz
Gala2k [10]

Taq polymerase enzyme important for efficiency in PCR because it is thermostable polymerases that remain active at high temperatures (90 -95  degree Celsius) a beyond the denaturation temperature of DNA.

PCR :

Polymerase chain reaction (PCR) is a laboratory technique for rapidly amplifying millions to billions of copies of a specific segment of DNA, which can then be used for further research.

Taq polymerase is a DNA polymerase derived from bacteria called Thermus aquaticus, which are naturally thermophilic and is a thermostable polymerases that remain active at temperatures higher than the temperature at which DNA is denatured. This allows PCR to be used on DNA samples without the need to add new DNA polymerases after each cycle.

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4 0
2 years ago
A well tested hypothesis with a large amount of evidence to support it is called a??​
Zepler [3.9K]

Answer:

It is considered a Scientific Theory.

3 0
3 years ago
Explain the different movements in plants due to growth​
Andreyy89

Explanation:

This shows movement of a plant. Plant movement due to external stimuli are of two types: tropism and nasties. When the direction of external stimulus decides the direction of response in the form of growth it is called tropism. Thus, tropism is the directional growth movement of a plant part.

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8 0
3 years ago
Gas exchange involves the transport of two respiratory gases, oxygen and carbon dioxide. Review how each gas is transported betw
pickupchik [31]

Answer:

1)required for cellular respiration(Oxygen only)

2) net diffusion from alveoli to lung capillaries(Oxygen only)

3)sometimes transported as bicarbonate(Carbon Dioxide Only)

4)net diffusion from body tissues to blood(Carbon Dioxide Only)

5)net diffusion from lung capillaries to alveoli(Carbon Dioxide Only)

6)waste product of cellular respiration(Carbon Dioxide Only)

7)enters alveoli during inhalation(Both Oxygen and carbon dioxide)

8)transported by hemoglobin(Both Oxygen and carbon dioxide)

Explanation:

Gas exchange is a mechanism that helps the body to get the necessary Oxygen that is required for cellular respiration to take place

There is diffusion of oxygen to capillaries that are present in the lungs from the alveoli.

Gas exchange is a mechanism that is also responsible for the body to get rid of waste such as carbon dioxide,

5 0
3 years ago
Pectinate muscles are found on the Multiple Choice external wall of the right atrium. posterior walls of the right and left vent
Alenkinab [10]

Pectinate muscles are found on the internal walls of the right and left atria. The correct option is C.

<h3>What are pectinate muscles?</h3>

Pectinate muscles are ridge-like muscle elevations. They are parallel to each other and resemble comb teeth. They can be seen clearly inside the right atrium.

Pectinate muscles are found on the internal walls of the right and left atria.

Thus, the correct option is C.

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8 0
2 years ago
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