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vodomira [7]
2 years ago
14

What is the difference between a mass extinction and a regular (background) extinction? (1 point)

Biology
1 answer:
Alekssandra [29.7K]2 years ago
4 0

Answer:

the correct answer would be A. Mass extinction involves many species over a short period of geologic time.

Explanation:

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The correct answer will be “Biological Evolution”
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How are the lydias ice and lyric cycles different
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The lytic cycle involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell. The lysogenic cycle involves the incorporation of the viral genome into the host cell genome, infecting it from within.

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A mutualistic relationship in which either species can survive without its partner is called a ________ mutualism.
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facultative mutualism

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11Alexandr11 [23.1K]

Answer: B

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3 years ago
In their 1953 paper on the double-helical structure of DNA, Watson and Crick famously wrote: "It has not escaped our notice that
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Answer:

The statement suggests ability of existing DNA molecule to replicate itself by the process of DNA replication. Each strand of double helical DNA can serve as template for the synthesis of new complementary DNA strand.

Explanation:

Watson and Crick proposed the double-helical structure of DNA. Accordingly, the DNA molecule is a double helical structure in which two polynucleotide chains are held together by base pairing between the complementary bases of two chains.  

There are four nitrogenous bases present in DNA: adenine and guanine (purines) and cytosine and thymine (pyrimidines). Adenine always pairs with thymine and cytosine pairs with guanine base.  

According to Watson and Crick, the ability of one DNA strand to base-pair with a complementary DNA strand suggests the existence of the DNA replication process. During DNA replication, each DNA strand should serve as a template to specify the nucleotide sequence of the new DNA strand.  

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