Answer:
C. Sprout every year, year after year
Explanation:
The perennial plants are the plants that live for more then two years, thous some may argue that they are plants that live more then three years. Whichever the case, they are not short-lived plants, but are capable of surviving for numerous years, unlike the annuals and biennials. Theoretically, the shrubs and trees would fall into this category, but they are classified separately, and this term is not used for them, but for smaller plants that do not have or have very little woody parts. These plants tend to sprout every year, and even though they seemingly die in the autumn, their roots are alive, and they emerge and grow again in the spring, sprouting again. That process repeats itself for numerous years.
B) All living things are made of cells.
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Answer:
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Explanation:
The chemical originally contained in aerosol propellants that is thought to have contributed to the depletion of the ozone layer is the chlorofluorocarbons or the CFCs. These are nonflammable and nontoxic substances that has carbon, chlorine and fluorine in their structure. These substances are used as propellants, solvents and as refrigerants. However, it was found from researches that these substances would contribute to the depletion of the ozone layer in the atmosphere which is why under the Montreal Protocol, the use of these are banned and other alternatives are being used now in replace with the CFC. One alternative used is the <span>hydrofluorocarbons.</span>