<span>Plants are the main source of organic matter in soil.</span>
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D. Both competition and environmental filtering shape community structure.
Explanation:
Based on competition theory, two organisms occupying the same ecological niche can only coexist provided there is spatial or conditioning niche partitioning.This prevent competitive exclusion , ensuring survival of the two species in their niche. Since the two species developed greater variability in (over-dispersed traits) to resist the selection pressure,(competition).Many overdisperesed traits is present in the communities.
However environmental filtering, is concerned with selection of species with natural ability or triats to survive in a given communities,Thus if two species of organism meet the same ecologocal requirements in a community, environmental filtering, fitters them and ensure their survival ahead of others who do not meet the requirements, and could not survive.
Thus the simultaneous operation of theses two opposing selection pressures, structured communities ensuring coexistence and favoured ability of organism to survive.
The genetic code is the set of rules by which information encoded in genetic material (DNA).
Many scientists believe that greenhouse gases<span> are directly causing glaciers in all parts of the world to melt and recede at an unprecedented rate.
This is what these scientists believe. If you had any options, it would be best for you to write them down here.</span>
<span>Hippocrates believed that there are four humors in human body which need balance for a healthy being. These were:
Blood, phlegm, yellow bile, and black bile.</span>
Galen expanded the idea of the humors and introduced four temperaments which were these:
choleric (hot / dry), melancholic (cold / dry), sanguine (warm / moist), and phlegmatic (cold / moist).
Another expansion Galen did was that he gave each humor/temperament physical and psychological qualities and said that even the food items have an association with the certain humor, those foods can effect certain humor in certain ways.
