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Zigmanuir [339]
3 years ago
9

True or false: evolution, including the theory of common descent, is a very controversial idea among scientists

Biology
1 answer:
salantis [7]3 years ago
3 0
True. Common descent, at least, is a VERY controversial topic. Common Descent states that every species should have evolved from ONE SINGLE SPECIES (crazy, I know.)
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Define the term gene mutation​
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Answer:

it is the change in one or more genes

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2 years ago
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A person's blood type is determined by the:_______
matrenka [14]

Answer:

) Presence of specific glycoproteins on the cell membrane

Explanation:

When specif glycoproteins(antigens)  or antibody are present on a cell membrane of Red blood cell,they can  be used to identify the blood type.Antigens are substances capable of triggering an immune response in a cells.

In addition,they function in transport of molecules across the RBC. They help in the maintenance of the RBC,and aiding the arrest of cells capable of causing diseases to the body.

Therefore,they are good determinants of blood types,based on this two types of antigens present in a  blood type.

These two antigens  used for classification of blood types are the 1-the ABO antigens 2,the Rhesus antigens.

Essentially,when a WBC produces an antibody ,which is a molecule that defends the body,If this is not compatible,the antibody will recognize it as a foreign body and attack it.Thus such blood types are not compatible. Thus the antibody-antigen reaction are good for knowing and classify blood types.

Antigen can also be glycoprotein,carbohydrate or glycolipids.

Generally blood types are inherited from both parents.Therefore the antigen present on the RBC are combination of the alleles from each parent.

4 0
3 years ago
Questions 1 Compare the direction of the currents in the North Pacific Ocean with those of the South Pacific Ocean How are they
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Answer:lol

Explanation:

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3 years ago
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The table in Figure 12-2 shows the percentages of bases in a DNA sample. How much Thymine should you expect to find in the sampl
pickupchik [31]

Answer:

22% Thymine

Explanation:

There should be 22% Thymine because of Thymine pairs with Adenine, which on the table is shown to be 22%. (the complementary  base pair are always equal). and the same would apply to Guanine (28%) and cytosine (28%).  

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Differentiate between persistent and latent animal virus infections.
lana66690 [7]

Answer:

The difference between both infections is that viral infections where the virus is latent, this virus once infected is protected in the nerves of the animal organism, as for example in humans the herpes family viruses (HSV1) are housed in ganglionic terminals such as the trigeminal ganglion or the V cranial nerve, so that in a situation of immunodepression, reinfect the individual again, causing him to be unable to remove the virus from his body.

On the other hand, persistent infections diseases are the threats that persist because the microorganism cannot be eliminated, either because it is very complex, or the cure does not exist, or the correct treatment is not carried out. Furthermore, it is necessary to consider that some microorganisms mutate becoming resistant to these drugs and thus persist longer in the body until they are eliminated.

Explanation:

In short, latency refers to the fact that the individual lives with the virus for life, and persistence is that it is possible to eliminate it over a long period of time since the infectious microorganism is considered very difficult.

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