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stiv31 [10]
3 years ago
10

Which is the best explanation for how air masses move across the United States

Biology
1 answer:
Akimi4 [234]3 years ago
6 0
Warm air rises, expands, then cools. As cool air sinks it may cause precipitation. Some air masses such as the MT which originate in warm environments carry humid air and cause heavy precipitation in some areas.
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What are the mechanisms by which aneuploidy and polyploidy are caused? What are the mechanisms by which aneuploidy and polyploid
sleet_krkn [62]

The correct answer is:

The principal cause of aneuploidy is chromosome nondisjunction during mitosis or meiosis. Polyploidy in nature can result either from the duplication of euploid chromosome sets from a single species or from the combining of chromosome sets from different species.  

Aneuploidy is a phenomenon when there is the presence of an abnormal number of chromosomes in a cell (an extra or missing chromosome). Usually it appears as a result of improper cell division (chromosomes don’t separate) and it can cause many genetic disorders.

Polyploidy refers to a state when there are more than two sets of chromosomes (one from mother one from father). Triploid (three sets of chromosomes) and tetraploid (four sets of chromosomes) chromosomes are examples of polyploidy. This phenomenon is most common in plants.

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3 years ago
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zhuklara [117]
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Lesechka [4]
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8 0
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How many nucleotides are there in a codon?
cestrela7 [59]

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three

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6 0
2 years ago
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Are atoms created or destroyed in a chemical reaction? How do you know?​
marusya05 [52]

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