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Crank
4 years ago
5

What signals a cell to start dividing

Biology
1 answer:
Alex787 [66]4 years ago
7 0
Its DNA, i.e. nucleus is in charge of it.  If the cell works inside of a multicellular organism, it will only divide if more cells are necessary.  (If growth is happening or cells are killed).  In a single-celled organism, it will divide as much as possible unless negative exterior forces are acting upon it.
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What type of front forms when the surface position of the front does not move?
Irina18 [472]

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Occluded fronts usually form around mature low-pressure areas almost always to the north where the two fronts meet.

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3 years ago
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suter [353]

Answer:

The best example of environmental influence that would most likely result in natural selection is that a food resource disappears in a pond, and some frogs in a population can eat the remaining food resource, while others cannot.

Explanation:

Among the environmental factors that can influence natural selection at a given time is the availability of food. Natural selection, from the point of view of evolution, is influenced by adverse environmental conditions, being food shortage one of them.

In conditions of food shortage in a pond, as in the example of the frog population, only the most apt will be able to take advantage of nutritional resources, while the less apt will not be able to survive. The ability to survive with little food available becomes an inherited trait that will be passed on to future generations.

In any case, tolerance to adverse conditions becomes adaptation, which translates into survival and reproductive success.

  • <em>The other options are not correct because </em><u><em>none of them show environmental pressure that can lead to natural selection</em></u><em>.</em>
5 0
3 years ago
Read 2 more answers
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