Mitochondria is the correct answer
The second cell would not be able to produce as much food because it could not capture sunlight.
That would be mutualism, i believe
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The answer is 4.315 billion kilometers so it would be 4.315 x 10 to the 9th power if that is what is meant and Neptune is the eighth planet outward from the sun (the most distant planet from the sun) so it is a tremendous distance from the earth and would be very hard for humans to reach with such a distance.
Researchers can examine the biological basis of fear, smell, memory, and diseases by using the following techniques:
1. The Role of Pro-inflammatory Cytokines in Memory Processes and Neural Plasticity.
2. Memory Systems.
3. The Memory Network.
4. Psychological and Neural Aspects.