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LuckyWell [14K]
3 years ago
9

Which statement describes solstices?

Biology
1 answer:
jeyben [28]3 years ago
4 0

Answer:

They occur when the Sun reaches its highest or lowest point in the sky.

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In a sample of double-stranded DNA, 10 percent of the nitrogenous bases are guanine (G). What percentage of the nitrogenous base
DanielleElmas [232]

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40%

Explanation:

Remember that guanine always pairs with cytosine, and thymine always pairs with adenine. That means that any time there is a guanine, there is always a cytosine.

If there are 10% guanines, then there are 10% cytosines. That means the total of guanines and cytosines is 20%.

The other 2 bases (thymine and adenine) have to make up the rest of the bases. That means they have to make up 100-20 = 80%.

Again, there will be equal amounts of thymine and adenine, so 80%/2 = 40%.

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3 years ago
When a bacteriophage virus infects a host cell, sometimes it causes virus nucleic acid to fuse with the DNA of the host cell and
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lysogenic

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Phages can generate the lytic cycle or the lysogenic cycle, although very few are able to carry out both. If lysis is carried out, lysogeny cannot be carried out and vice versa. In the lytic cycle, phage host cells are lysed (destroyed) after replication and encapsulation of viral particles, so that new viruses are free to carry out a new infection.

On the contrary, in the lysogenic cycle there is no immediate lysis of the cell. The phage genome can be integrated into the chromosomal DNA of the host bacterium, replicating at the same time as the bacterium does, or it can remain stable in the form of a plasmid, independently replicating bacterial replication. In any case, the phage genome will be transmitted to the entire progeny of the originally infected bacteria. The phage is thus in a state of latency until the conditions of the environment are deteriorated: decrease of nutrients, increase of mutagenic agents, etc. At this time, endogenous phage or phage are activated and give rise to the lytic cycle that ends with cell lysis.

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Because solutes ____________ water potential, water movement in cells is influenced by their concentration.
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