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jeyben [28]
3 years ago
10

Mrs. anderson presents with an itchy raised rash that appears and disappears in various locations. each lesion lasts for many mi

nutes. which most likely accounts for this rash?
Biology
1 answer:
Pepsi [2]3 years ago
4 0
<span>The rash was most likely caused by hives. Hives disappear and reappear on different parts of the body and are known for changing their form when they reappear. The itchy rash quickly turns into welts that irritate the skin. Mrs. Anderson's itchy rash lasts for a few minutes and disappears, which sounds like hives, since they can disappear just as fast as they appear.</span>
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Crick et al found that not all combinations of (+) and (-) frameshift mutations results in suppression and an rII+ phenotype. Wh
GenaCL600 [577]

Answer:

d. Two of the above explanations are correct.

Explanation:

A frameshift mutation is commonly known as a genetic mutation that occurs as a result of the indels such as the addition or removal of certain nucleotides in the sequence of a DNA that is indivisible by three. In the presence of addition or removal, the reading frame from the initial translation to a different one. Thus, the correct option is option d.

5 0
3 years ago
Why do Primary succession happen
Alja [10]

Answer:

Explanation: Primary succession occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized for the first time. For example, primary succession may take place following the eruption of volcanoes, such as those on the Big Island of Hawaii. As lava flows into the ocean, new rock is formed.

4 0
2 years ago
The breakdown of food via enzymatic reactions is known as __________.
r-ruslan [8.4K]
I believe you're looking for "chemical digestion".

Chemical digestions is where food that we ate is digested into simpler and soluble molecules that can be absorbed by our body. Enzymes are used as a catalyst to speed up the reaction.

One example is the digestion of lipids. Enzyme named lipase is used to speed up the digestion of lipids into 3 fatty acid molecules and 1 glycerol. This way, our body can absorb these simple molecules, and use them in order to make our body function.

On the other hand, physical digestion does not include enzymes, such as chewing in our mouth, therefore, don't mix them up!
4 0
2 years ago
What are the common promoter elements found in eukaryotic genes, and how are they different from enhancer elements?
V125BC [204]

Answer:

In eukaryotic cells you find core and proximal promoters.

Promotors are specific DNA sequences where transcription factors (proteins) and RNA polymerase binds to initiate transcription. Promotors are located upstream the coding sequence

Core promoters are where RNA polymersae binds and proximal promoters are where transcription factors bind.

Enhancer elements are DNA sequences where transcription factors (proteins) bind to increase the rate of expresion of an specific gene. Enhancers can be located either upstream,  downstream or thousands of nucleotids away  from the of the coding region.

Explanation:

Promoters and enhancer are key elements for controling gene regulation. Transcription begins when chromatin rearranges from a condensed state to a accesible state, this allow to transcrition factors and RNA polymerase to  bind specif DNA sequences (promotors).  Proteins bind to enhancers , this complex develops a DNA loop, so that the protein that is bound to the enhancer interacts with the RNA polymersase. When this interaction is made, the activity of the RNA polymerase is increased.

7 0
3 years ago
As TSH levels fall, the thyroid gland slows down thyroxin secretion. <br> True or False
kati45 [8]

Answer:

I think s its True

Explanation:

What do low levels mean? Low TSH levels indicate hyperthyroidism. This is also known as an overactive thyroid. If the thyroid gland is secreting levels of hormones that are too high, the pituitary gland produces less TSH

hope it helps

4 0
3 years ago
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