Answer:
D. they are usually dominant or recessive.
Explanation:
alleles are pairs of genes found on a particular spot a chromosome. If one is dominant over the other it give rise to a particular trait.
D, this competition effects death rates, birth rates hence effecting growth rates, in A less dense area competition would be low increasing birth rates and growth rates while decreasing death
These defenses are described as nonspecific because they do not target any specific pathogen; rather, they defend against a wide range of potential pathogens.
<h3>Is innate immunity nonspecific resistance?</h3>
The innate immune system provides this kind of nonspecific protection through a number of defense mechanisms, which include physical barriers such as the skin, chemical barriers such as antimicrobial proteins that harm or destroy invaders, and cells that attack foreign cells and body cells harbouring infectious agents.
Thus, they do not target any specific pathogen; rather, they defend against a wide range of potential pathogens.
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The answer is B because the oil can cause major pollution, killing most of the living organisms in the lake, while the others cause more mild pollution or small invasion of organisms homes
Louis Pasteur proved it in the middle of the eighteenth century
