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Bezzdna [24]
3 years ago
10

Explain how gradualism, punctuated equilibrium, and extinction can be used to describe an organism's phylogenetic tree. ​

Biology
1 answer:
krok68 [10]3 years ago
8 0

Answer:i dont know

Explanation:

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const2013 [10]

Answer:

D. Xylem and pholem

Explanation:

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3 years ago
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As opposed to external fertilization, internal fertilization ensures that
Vilka [71]
<span>d. only the fittest of sperm and egg combinations will survive.

Others are external fertilization:

</span>a. all of the sperm will fertilize eggs.
b. sperm and egg will be released simultaneously.
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4 0
3 years ago
What change is observed in leukocytes during an allergic disorder (type I hypersensitivity) often caused by asthma, hay fever, a
blagie [28]

Answer:

Increase in eosinophils.

Explanation:

The leukocytes are the white blood cell that plays an important role in the immune system. The white blood cell include eosinophil, basophil, neutrophil and monocytes.

The allergic reactions that are caused by hay fever or asthma is marked by the excess increase in the number of eosinophils in the body. The eosinophils are the first to reach at the site of parasitic infections and protect the body during the allergic reactions.

Thus, the answer is eosinophils.

5 0
3 years ago
Which timeline shows the correct order of contributions made to the discovery of DNA?
Anna11 [10]

Answer:

The correct answer is B.

Explanation:

DNA was discovered in 1800, and then scientists studied DNA with X-Rays. After a while, scientists published a 3D model of DNA, and shortly after, scientists decoded DNA genes. So the answer is Option B.

Hopefully, this helps! :D

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7 0
2 years ago
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When conducting scientific research, any information that is found must be analyzed to determine its validity. Joel is a firm be
UkoKoshka [18]
The answer is <span>c. Cold and flu season occurs when the weather is cold, so there must be a connection.

Even though choices a. and b. could make sense, nothing in Joel's research implies the connection between the choices and cold. Therefore, this leaves choice c. as the right one. If cold and flu season occurs</span><span> when the weather is cold, there must be a connection between cold and cold weather.</span>
3 0
3 years ago
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