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aniked [119]
3 years ago
11

What is an index fossil?

Biology
2 answers:
QveST [7]3 years ago
6 0
Used to define and identify geological times.<span />
dimulka [17.4K]3 years ago
3 0

Answer:

A fossil found in rocks from one time period

Explanation:

An index fossil is an fossil of an organism which lived at only one time during the evolutionary history. The index fossils are useful since they are only obtained from rock of one particular evolutionary time zone.  Restricted presence of index fossils represents the fact that they lived during a relatively brief period of geologic history. These fossils are used for dating and correlating the various time zones of evolutionary history

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Compare and contrast the cell cycle with mitosis and the cell cycle with meiosis. Citing atleast 4 similarities and 5 difference
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Answer:

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Mitosis is a form of eukaryotic cell division that produces two daughter cells with the same genetic component as the parent cell. Chromosomes replicated during the S phase are divided in such a way as to ensure that each daughter cell receives a copy of every chromosome. In actively dividing animal cells, the whole process takes about one hour.

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Because of the fact that female mammals have chromosomes from both parents (from the father and from the mother) and all cells have the same inactivated X chromosome  female mammals are considered to be mosaic <span>of the maternal and paternal cells.</span>
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