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Luda [366]
3 years ago
13

Viruses are particles of DNA surrounded by a protein coat in which way do viruses depend on living cells

Biology
1 answer:
Phantasy [73]3 years ago
4 0
Viruses need to infect living cells of other organisms in order to replicate their genetic material. When not in an infected living cell, they are considered independent particles, in the form of DNA surrounded by a protein coat. Only when a virus enters and infects a living cell, it can then start its reproductive cycle. It uses the host's (infected cell) replication system, to replicate its own DNA or RNA and create the necessary viral proteins to create more viruses. The newly created viruses are then able to infect other living cells. 
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7 0
3 years ago
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Why do scientists usually try to work without making the animals aware that humans are present
FromTheMoon [43]

Answer:

In animal field studies, why do scientists usually try to work without making the animals aware that the humans are present? It is necessary to observe the animals without disturbing them. When a controlled experiment is not possible, why do scientists try to identify as many relevant variables as possible?

4 0
3 years ago
Knowing that some individuals from Island 1 colonized Island 2, biologists sample the Mainland and two Island populations fifty
raketka [301]

Answer:

The evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect.

Explanation:

Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time and eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster -bottleneck effect- or because of a population split -founder effect-. In <u>founder effect</u>, a new population originates when a few individuals who are coming from a bigger population carrying its genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, <u>genetic variability is reduced</u> and there exists the possibility of developing a peculiar allelic composition. If the number of individuals that originated the new population is low, the founder effect will be very extreme, because the effects of the genetic drift are inversely proportional to the original number of individuals.  

<em>In the exposed situation, the evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect. The fact that both islands are similar in their frequencies might be due to little genetic variation on island 1, or because dispersion to island 2 is a recent event on time. </em>

5 0
2 years ago
Which 2 compositions of water move within a deep water current?
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C. because if you
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7 0
3 years ago
An ecosystem is a community of organisms at a global level <br><br> True or False
const2013 [10]

Answer:

True

Explanation:

Hope this helps

4 0
2 years ago
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