Organic matter is essential in soil for it to be able to produce vegetation. what roles do organic matter play in making soil viable? select all that apply. 1points a aerating the soil b hydrating the soil c preventing pest infestation d providing nutrients through excrement and dead tissue

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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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bioteacher101