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sasho [114]
3 years ago
13

2. Explain why ground water can only be found within a few miles of the Earth’s surface.

Biology
1 answer:
dsp733 years ago
7 0
Ground water can only be found within a few miles of the Earth’s surface because water can permeate through the soil, but at one point, the ground becomes too dense for water to seep through.
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Which molecule prevents a muscle contraction from occurring when the muscle is at rest?
AysviL [449]

Troponin-tropomyosin molecules prevents a muscle contraction from occurring when the muscle is at rest.

<h3>What is muscle contraction?</h3>

The activation of tension-producing regions within muscle cells results in muscular contraction. Because muscle tension can be created without changes in muscle length, such as when holding something heavy in the same position, muscle contraction does not always imply muscle shortening in physiology. Muscle relaxation, or the return of the muscular fibers to their low tension-generating state, occurs after a muscle contraction has finished.

Both length and tension can be used to characterize muscle contractions. If the muscle tension varies but the muscle length doesn't, the muscle contraction is said to be isometric. A muscle contraction is isotonic, however, if the tension in the muscle remains constant during the contraction.

To learn more about muscle contraction with the help of given link:

brainly.com/question/10115123

#SPJ4

5 0
1 year ago
Describe how a plasmid can be genetically modified to include a piece of foreign dna that alters the phenotype of bacterial cell
Ilia_Sergeevich [38]
Simple version:

First, the section with the desirable gene must be identified. Assuming that has already happened, the section of DNA must be excised from the original genome using restriction enzymes, which recognize certain DNA sequences and snip DNA at those sites. DNA ligase is used to "glue" these ends back together. The DNA is inserted into a plasmid (also with restriction enzymes), which would usually contain antibiotic-resistance genes (so they survive in an environment containing the antibiotic, which would also help show if the bacteria have been successfully transformed). 

Then comes the actual transformation process. The bacteria to be transformed are mixed with calcium chloride (which causes the bacteria to be more receptive to the plasmids) and then mixed with the plasmids. The bacterial cells are subjected to a heat shock (the solution is heated and rapidly cooled, e.g. by placing the mixture in a hot water bath and quickly transferred to ice) so they will take up the plasmid (since the temperature change makes the membrane more permeable). The bacteria are placed on a growth medium containing the antibiotic they're resistant to. Only those successfully transformed would survive.
7 0
3 years ago
A 2006 genetic study of a large American family (Ikeda et al., 2006) identified a genetic linkage between DNA markers on chromos
nirvana33 [79]

Answer:

Yes

Explanation:

This is solely because a lod score for SCA5 and marker A is >3.0, so it indicates statistical significance.

3 0
4 years ago
Hi can someone help with these punnet squares?
Marizza181 [45]
I’m sorry i don’t know the answer but i wanted to warn you to NOT click on the link. it supposed to track your location. at least that’s what i heard
5 0
3 years ago
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Explain how bacterial cloning can help increasing the amount of DNA (DNA amplification) and when it is implemented in science or
Nezavi [6.7K]

Answer:

The process of gene cloning involve multiple steps. It involves many enzymes, bacterial cell, vector to produced an amplified number of cell and hence product.

The gene of interest is find and then it is carried into the bacterial cell by the help of vector.

The vector is then carried to get incorporated into the bacterial cell. In this way the bacterial cell starts replicating and the and the desired product is produced in high amount.

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3 years ago
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