Question:
Why does the virus need a host in order to multiply?
Answer:
Use the cells' resources
Explanation:
A virus is typically a is a DNA or RNA moiety encased in a protein capsule. The capsule is usually specific to the class and type of virus and it lends to the virulence of the entity. In order for infection to be established the virus must bypass the host's immune system and it's immune response and invade a host cell. There it will incorporate it's genetic material into the hosts' nucleus and harness the machinery that it does not in itself possess in order to make multiple copies of itself. It uses the host cell's DNA replication machinery, proteins amino acids and energy among other things before it bursts out of the cell and destroys it. This continues for some time and eventually the host may perish. The virus will then be passed along to a different host where it's replication using that hosts machinery will continue.
Answer:
b. resistance to extinction
Explanation:
This is because, when there is a schedule of reinforcement over a given case scenario, it offers partway to resistance to extinction.
<em>For example, in plant, when a particular plant is threatened by weeds trying to prevent it from growing, the plant would of intermittent reinforcement by trying to grow in any available space rather than allowing the its extinction by the weed.</em>
Answer:
construction is the correct answer
Answer:
Manifest destiny is a belief that many people in America at that time held. This belief made them convinced that they're somehow destined by God to spread democracy and capitalism to the rest of North America. The people at that time belief that it's the only correct system to ensure the freedom of all citizens.
But due to the large size of its territory, it is difficult to reach many different areas in north America. Railroad companies already exists. But, most of them only operates within one state. This problem was somehow solved by the creation of Transcontinental Railroad.
The transcontinental railroad was built with the intention to create a pathway connect all part of North America. It is an important infrastructure for the American people to create settlements in every corner of the country. This helped them spread the ideologies as intended in Manifest Destiny.
