The correct answer is sewage, I just did this stuff in class last week.
One of the major problems of monoculture farming is the variety of species. If there are no varieties in the producer level in the food chain all other organisms within the ecosystem would be affected.
I think they discovered chromosomes in DNA so that backed up his Idea
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Ptolemy's model was Geocentric. This means that it put the earth at the center of the solar system, instead of the sun, with all celestial objects orbiting it. The first person to prove the validity of the heliocentric theory was Nicolaus Copernicus.
The answer is interconnected. You will come to find that everything that makes life possible on earth is all interconnected. It is just like the way all the human activities and necessities for the everyday life are all interconnected to nature.
