Answer:
Explanation: All the energy in oil, gas, and coal originally came from the sun, captured through photosynthesis. In the same way that we burn wood to release energy that trees capture from the sun, we burn fossil fuels to release the energy that ancient plants captured from the sun.
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Answer:
The respiratory system supplies the oxygen that the cardiovascular system transports to the different cells for the production of energy.
Explanation:
Answer:
heterozygous
Explanation:
If an individual inherits two different alleles, their genotype is classed as heterozygous for that locus.