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nikklg [1K]
3 years ago
11

Fertile individuals that readily move from one geographic location to another contribute to.

Biology
1 answer:
Montano1993 [528]3 years ago
4 0
The answer is B (gene flow)
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Positive selection tests to see if the ______ of a T-lymphocyte can recognize and bind to an MHC molecule.
DENIUS [597]

Positive selection tests to see if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.

<h3>What is a T-lymphocyte?</h3>

A T-lymphocyte is a special type of immune cell that is generated inside the bone marrow.

The T-cell receptor (abbreviated as TCR) is a protein located on these immune T lymphocytes.

In conclusion, Positive selection identifies if the TCR of a T-lymphocyte can recognize and bind to an MHC molecule.

Learn more about T-lymphocytes here:

brainly.com/question/17025187

#SPJ1

7 0
3 years ago
Ben observes that his car will not start. What is a good testable hypothesiss
maksim [4K]
To name one of many: 
If Ben's car will not start, then the battery may be dead. 
6 0
3 years ago
True or False:
slamgirl [31]
“His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.”
4 0
3 years ago
Read 2 more answers
Assume that instead of Taq polymerase, another polymerase, one that is very heat-sensitive, was used in a PCR. What differences
BigorU [14]

Answer:

The heat sensitive polymerase would be denatured resulting in formation of little or no PCR products.

Explanation:

PCR is a technique that forms multiple copies of a small DNA sample. For the purpose, the DNA sample is exposed to very high-temperature conditions (around 95 degrees C) to facilitate the denaturation of DNA helix. These high-temperature conditions denature enzymes such as heat-sensitive DNA polymerases. Therefore, no or very little DNA molecules will be formed by the end of the process as the denatured DNA polymerase would not be able to extend the primers.

To avoid these conditions, heat-tolerant Taq polymerase is used in PCR which can withstand the extremely high-temperature conditions of PCR.

5 0
4 years ago
Match the human activity and how it increases the greenhouse affect
laiz [17]

Answer:

1. primary cause of human-created carbon emissions = burning fossil fuels

2. destroys natural carbon sinks leading to more carbon dioxide in the air = deforestation

3. emits methane from decomposing matter = waste disposal in landfills

Explanation:

1. "Fossil fuels" are <em>nonrenewable resources</em> that are considered essential for the operation of many factories and industries. <em>Burning them accounts for most of the carbon emissions on Earth</em>, and this leads to<em> "global warming."</em>

2. "Forests" are considered "carbon sinks" because they have a role of <u><em>absorbing the carbon dioxide in the atmosphere</em></u>. Cutting down the trees (deforestation) makes forests barren. It then leads to more carbon dioxide in the air.

3.<em> Waste disposals in landfills contribute to the amount of methane that is released into the atmosphere.</em> Methane is considered a <em><u>potent greenhouse gas</u></em> that affects people's health.

7 0
3 years ago
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