Answer:
Herd immunity
Explanation:
Herd immunity refers to the resistance of a group of people against infection and the spread of a pathogen. It occurs when a high proportion of the members of that group are resistant against a particular pathogenic infection. When an earlier exposure or vaccination of a large proportion of individuals of a population does not allow the pathogen to spread among and infect the otherwise susceptible members of the population, the population is said to have acquired the herd immunity.
In the given example, vaccination of a large percentage of a population protected the susceptible individuals against a particular microbe. This represents an example of herd immunity.
Mercury,Venus,earth, and mars
Animals, plants and other lfe forms are seen on other continents by moving or traveling
Answer:
<em>It is the outermost covering of a cell that separates the contents of the cell from its external environment. </em>
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<em>It only allows the entry and exit of some materials. It also prevents the movement of some. Therefore, it is also called a selectively permeable membrane.</em>
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<em>Some substances like carbon dioxide and oxygen can move across the cell membrane due to the process known as diffusion.</em>
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<em>Water also obeys the laws of diffusion. The movement of water molecules through a selectively permeable membrane is called osmosis.</em>
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<em>Pls mark as brainliest.</em>
