The deer population decreased drastically because there were so many hostile animals where the deer where. For instance the wolves went up, then down as the deer decreased. When the wolves were low, the deer increased in growth.
Animals were used for food.!
Answer:
A biological system is a complex network which connects several biologically relevant entities. Biological organization spans several scales and are determined based different structures depending on what the system is. Examples of biological systems at the macro scale are populations of organisms.
Endemic species and were studied by Charles Darwin<span> during the voyage of the Beagle. His observations and collections contributed to the inception of Darwin's theory of evolution by natural selection....
Hope this helps.!
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The cardiovascular system has three main functions:
transport of oxygen, carbon dioxide and nutrients.
clotting of open wounds.
regulation of body temperature.