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Reptile [31]
3 years ago
12

Which animals has a heart in which oxygenated and deoxygenated blood mix?

Biology
1 answer:
horrorfan [7]3 years ago
7 0
A frog is one of them
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The correct answer would be <u>a virus because a virus is the only microbe that cannot reproduce on its own without a host</u>. A virus utilizes the genetic mechanism of its host to reproduce either lytically or lysogenically.

<u>In lytic cycle</u>, the virus utilizes the genome system of the host to produce more viruses that eventually leave or lyses the host to become independent viral particles, killing the host in the process.

<u>In lysogenic cycle</u>, the virus inserts its genome into that of the host and uses the host's replication machinery to replicate its genome. The virus then waits for the defense mechanism of the host to become weakened before multiplying and lysing the host.

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As scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to ne
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<span>The answer is A. The reduction in variety reduces the number of alleles for each gene in the gene pool.   This reduces the variations in the phenotypes of the crops.  A disadvantage of this phenomenon is that it would be difficult for the crops to withstand environmental changes and calamities because there is no wide variation on which natural selection could act upon to enable the crops to adapt to these changes.</span>




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