A virus<span> is a small </span>infectious agent<span> that </span>replicates<span> only inside the living </span>cells<span> of other </span>organisms<span>. Viruses can infect all types of </span>life forms<span>, from </span>animals<span> and </span>plants<span> to </span>microorganisms<span>, including </span>bacteria<span> and </span><span>archaea
</span>While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles. These viral particles<span>, also known as </span>virions<span>, consist of two or three parts: (i) the </span>genetic material<span> made from either </span>DNA<span> or </span>RNA<span>, long </span>molecules<span> that carry genetic information; (ii) a </span>protein<span> coat, called the </span>capsid<span>, which surrounds and protects the genetic material; and in some cases (iii) an </span>envelope<span> of </span>lipids<span> that surrounds the protein coat when they are outside a cell. The shapes of these virus particles range from simple </span>helical<span> and </span>icosahedral<span> forms for some virus species to more complex structures for others. Most virus species have virions that are too small to be seen with an </span>optical microscope<span>. The average virion is about one one-hundredth the size of the average </span>bacterium<span>.</span>
Hi Asthma is the illness of the lungs characterized by these traits.
Hope this helps.
Answer:
Genotype ( genetic appearance )
Explanation:
When some individuals of a population become isolated from the original population then the two groups are also not able to reproduce together due to difference in genotype, So variations and mutations which causes change in genotype that occur in one group are not necessarily found in the other group which leads to speciation. The longer the groups are isolated, the more different they are they eventually become different species called speciation. When some individuals of a specie remain isolated from the rest of the members due to any type of barrier ( physical or geological) in between the individuals of both the original species and currently isolated individuals so due to mutation the genotype of these individual changes and leads to speciation .
Explanation:
you just need to know that :
population density = no of ( what is asked) / land area.
Your question isn’t clear though each body system holds its prime importance.
