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il63 [147K]
3 years ago
11

The origin and evolution of viruses is controversial. Discuss whether you think viruses evolved before the first cell or whether

they have
coevolved and are perhaps still coevolving with their hosts.
Biology
1 answer:
Illusion [34]3 years ago
5 0

Answer:

sorry i don't know the answer

Explanation:

answer ka hrit no aw sorry

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How have frogs evolved from 500 mpa to 250 mya?
Zolol [24]
They reproduce over the years making it less frog to survive
7 0
3 years ago
A non native species of fish is introduced into a lake. which would most likely prevent this fish from becoming an invasive spec
satela [25.4K]
The factor that will prevent the species from becoming an invasive one is predation.

If the species of fish introduced is an apex predator, there will be no organisms present to keep the population of the fish in check. Moreover, if the introduced species has a selective advantage over those that it shares the same niche with, then it is more likely to oust these species from the food chain by consuming all of their resources. 
4 0
3 years ago
Read 2 more answers
A volcanic eruption on the coast of Japan in 1850 deposits a layer of ash on top of a layer of red clay, and the ash is covered
jek_recluse [69]

Answer:

Option B

Explanation:

The series of events mentioned in this description are as follows -  

a) In 1850, ash layer deposits over the layer of red clay  

b) In 1902, layer of silt from tsunami covers the ash

Now pot is found in between ash and red clay layer  

While coin is found in between ash and silt.  

Thus, it is clear that pot was first buried between the ash and red clay layer. While coin was buried in 1902 above the ash layer but beneath the silt layer.  

Hence, option B is correct

 

4 0
3 years ago
What is the estimated age of Earth? 10 billion years 6.4 billion years 2.6 billion years 4.6 billion years
wlad13 [49]
The estimated age of the earth is 4.543 billion years, which rounds to 4.6 billion years. 

Hope this helped.
3 0
3 years ago
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Which type of genetic exchange occurs among bacteria in which dna is carried into a bacterial cell by means of a virus?
Blababa [14]

Answer:

Transduction

Explanation:

Among the three types of gene transfer in bacteria, transduction does not require physical contact between the two bacteria cell. Viruses that infect bacteria accidentally move pieces of chromosomal DNA from one bacterium to another. These viruses that infects bacteria are called bacteriophages.

Simply put, transduction is a process of genetic recombination in bacteria which involves the incorporation of the genes of a host cell (bacterium) into the genome of a viral cell (bacteriophage) and then conveyed to another host cell when the bacteriophage infects it. The process of transduction is of two types; generalized and specific depending on whether any gene or specific gene is transduced respectively.

The aim of these viruses when they infect bacteria cell is to harness the ability of bacteria to replicate, transcribe and translate their genetic material and use it to procreate into many virons or complete their viral particle.

3 0
3 years ago
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