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soldi70 [24.7K]
3 years ago
11

The retreat of the shallow seas of the Paleozoic left much of Virginia exposed during the Permian and Mesozoic. In central Virgi

nia, trace fossils, including _______ footprints have been found
Biology
2 answers:
arlik [135]3 years ago
7 0

The answer is Dinosaur. I just did this on USA TP

Kisachek [45]3 years ago
5 0

The given blank can be filled with dinosaur footprints.  

In the Precambrian, the sedimentary rocks deposition took place in the Blue Ridge Province of Virginia, however, no fossils have been positively determined from these deposits. The Paleozoic rocks are well documented in Virginia. The occurrences of shallow area deposition were obstructed by subsequent periods of erosion and mountain-building incidents.  

The withdrawal of the widespread shallow regions of the Paleozoic left much of the state exposed at the time of Mesozoic and Permian. In central Virginia, fossils of freshwater fish, dinosaur footprints, and insects are found in the rift basin deposits of the Triassic.  


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Because this person exists

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Technology can have good and bad effects. What is a bad effect of spraying pesticides on crops with the use of airplanes?
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The correct answer is option a, that is, It is sometimes sprayed too far from the crops.

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Aircraft spray of pesticides takes place from a greater altitude than the ground-based equipment and on a major scale, both of these elements may enhance the threat of spray drift.  


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Why do most cells in the human body divide infrequently?
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Animals that maintain internal body temperature using heat generated by their own metabolism are called
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Answer:

Explanation:

The complete question is as follows :

Animals that maintain internal body temperature using heat generated by their own metabolism are called:

A)thermoregulators.

B)hibernators.

C)aerophiles.

D)endotherms.

E)dormants.

  • An animal that is capable of maintaining a body temperature that is metabolically favorable for the organism is known as an endotherm.
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7 0
3 years ago
Describe the key chromosome behaviors during mitosis.
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Answer:

Explanation:

During mitosis, the chromosomes are distributed equally in the resulting chromosome. The chromosome number was doubled in the S phase of the interphase and the cell is ready for mitosis. The chromosomes are more condensed and twisted in prophase. It is also double in length. During the metaphase, the chromosomes are arranged in the metaphase plate. The microtubules from the centriole attach to the centromere of each chromosome and pull them towards the pole.  

Thus each chromatid pulls apart and migrates towards the poles. The nuclear membrane and nucleus disappear during mitosis. At the end of telophase, the daughter cells contain an equal number of chromatids as in the parent cell.  

Sometimes the microtubules of centrioles do not function properly and fail to pull the chromosomes equally to the cells. Thus one of the daughter cells contains more chromosomes and another fewer chromosomes. This occurs in anaphase. This results in the non-disjunction of chromosomes.  

Sometimes centromere splits transversely instead of longitudinal division. This results in the formation of 2 daughter chromosomes of unequal length. This is called the isochromosomes.  

The number of chromosomes distributed in the daughter cells results in a normal cell or any genetic disorder. The main function of mitosis to produce daughter cells having an equal number of chromosomes present in the parent cell.

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