Answer:
Chemical nutrients and energy tend to flow in the same direction for most of an ecosystem. The big difference is that the chemical nutrients are ultimately recycled in the ecosystem while the energy is ultimately lost from the ecosystem to the universe at large. Energy in any ecosystem ultimately comes from the Sun.
The answer is: B
Because the Male is the individual. The Female has two chromosomes in its cell.
The discovery of independent DNA (from the host) in mitochondria and chloroplasts supports the endosymbiotic theory.
I believe the answer lies in the function and adaptive physiology towards the two anatomical different nerves. This correlates to their response and reaction to the present stimuli.
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