The makeup of air/atmosphere,can change the pH.
For example, when the USA relied heavily on coal fired electric generating plants the air became acidic.
This polluted air would drift or be blown around the continent. When the rains came, “acid rain” would overwhelm many trees and other vegetation, harming it.
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Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much
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B. Ingestion of bacteria
Explanation:
Phagocytosis is not pathogen-specific
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Mendel's law of independent assortment states that the genes are separated and inherited independently of each other into the gametes.
The corn can be used to study the law if independent assortment as each kernel of the corn is its fruit. Thus, it is a result of sexual reproduction.
Single corn may contain 800-1000 kernels which may have different shape, texture, structure et cetera as result of independent assortment, that is, each kernel receives alleles of genes independent of each other.
For example, a gene responsible for the texture of kernel would be inherited independently of the gene responsible for the color of the kernel.