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Ratling [72]
2 years ago
15

Which statement correctly describes cancer formation?

Biology
1 answer:
AleksandrR [38]2 years ago
4 0

Answer:

Cancer is formed when there are mutations in a number of genes.

Explanation:

Malignant tumors are gene diseases which do not mean that cancer is necessarily an inherited disease (only in 5-10% of cases the cancer is inherited) because the vast majority of other tumors are the result of somatic, ie secondary, mutations that lead to malignant transformation.

Only 2% of human diseases are monogenic (caused by a change in one gene). The remaining 98% of the disease is either polygenic (caused by a change in several genes at the same time) or epigenetic (caused by non-genetic or post-genetic disorders of cellular molecules).

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convection within the atmosphere

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Which of the following is not an example of a negative feedback loop?<br>​
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Birth is an example of a normally occurring positive-feedback mechanism.

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3 years ago
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Apply Concepts:
Vlada [557]

Answer:

  the very long river

Explanation:

Larger rocks tend to settle out of the water flow sooner than smaller rocks do, so the rocks remaining at the end of a very long river would tend to be very small. A very short river may still be carrying somewhat larger rocks.

The very long river probably drops the smallest rock pieces near the ocean.

_____

Perhaps the implied assumption here is that a very short river will have a higher gradient than a very long river. Another assumption is that rocks are picked up nearer the headwaters, and the gradient decreases with distance.

If both rivers end at a waterfall into the ocean, they may very well carry the same sort of rock size distribution. If the short river traverses muddy terrain, and the longer river traverses rocky terrain, the answer may be reversed.

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3 years ago
What is the Marcellus Shale, and why is it so important to ancient ocean life?
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The Marcellus Shale also categorized as the Marcellus formation is a marine sedimentary rock unit of middle Devonian age found in eastern North America. It elongates throughout the major of the Appalachian Basin.  

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8 0
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