<span>C) The emissions of the internal combustion engine which runs on oil/gas has added to air pollution such as smog. </span>
The slightest change in pH can destroy the substance or organism. The pH of a cell's interior helps regulate the cell's chemical reactions. For example, the pH of blood is 7.4, if blood falls to 6.8 or lower or 8.2 or higher, it results in death.
The correct answer to this question is <span>The allele for short pea plants is masked during the F1 generation, but it is still present in the genotype.</span>
Answer #1: instinctual trait
Answer#2: learned trait
The skeletal system supports and protects the body and the muscular system is for movement.
