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Andreas93 [3]
3 years ago
7

Explain how the fossil record indicates a long history of changing life forms.

Biology
2 answers:
LuckyWell [14K]3 years ago
8 0

The fossil record essentially keeps track of the abundance and appearance of various fossils during different time periods. As time goes on, the fossils change. Using the fossil record, we can compare and contrast the fossils to develop theories about changing life forms and their connection to time.

Hope this helped :)

vodka [1.7K]3 years ago
5 0

Answer:

The fossil record shows that different species have evolved over time. The fossil record also provides evidence of how a specific organism evolved from earlier species. The fossil record shows that organisms have become more complex over time. It also shows which organisms lived during the same time period, which have a common ancestor, and which have become extinct.

Explanation:

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6 0
2 years ago
Which of the following is the most abundant group of organisms on Earth?
xxTIMURxx [149]

Bacteria is the most abundant group pf organisms on Earth.

answer : D

4 0
3 years ago
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The incidence of Down syndrome, also known as trisomy 21, increases with increasing maternal age. Which of the following errors
Naily [24]

Answer:. Nondisjunction during meiosis I in either the male and female gamete

The failure of   homologous chromosome to separate at mitosis,  or failure of sister chromatids  to separate at Anaphase of  meiosis I or ii is called  non-disjunction.

 In this  cell division anomaly the  unsegregated chromosomes  are  separated  into  cells as single chromosomes, therefore extra copies are  therefore inherited.This  result is one of the cell having an extra copies of  chromosomes than others( chromosomes 21.

If this extra  chromosome copies  is segregated into a sperm or egg, the resulting zygote cells will   have extra  copy as  chromosome 21, and hence Down syndrome.

→It is more common in Meiosis 1 than ii,because of longer duration of the first stage of division than meiosis ii,given rooms to errors.

→Most common in women(with age increase)  than men because of exchange of telomeres in   them,which  worsen with age. Their Meiotic mechanism  which   weaken with age, and  more prone to errors compare to men,

Explanation:

5 0
3 years ago
What cell activity is depicted in this picture?
Nana76 [90]
Gene coding / DNA replication
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3 years ago
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