On his visit to the Galapagos Islands, Charles Darwin discovered several species of finches that varied from island to island, which helped him to develop his theory of natural selection. He defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".
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Answer:
Explanation:
Continental air masses are characterized by dry air near the surface while maritime air masses are moist. Polar air masses are characterized by cold air near the surface while tropical air masses are warm or hot. Arctic air masses are extremely cold.
<span>Oryctolagus cuniculus</span>
Answer: Vaccines definitely work against viruses and bacteria.
Explanation: Vaccines are the biological preparation that improves the immune system to fight against a certain disease. A vaccines work by introducing the pathogens in the immune system. In response to the these pathogens immune system start producing antibodies to fight against the disease. so next time when pathogens attack antibodies are able to fight better then before.
Answer: This is a hard question because we need copper for just about anything. Some people say that electric cars are better because the conserve fuel, but they have copper. The source of all of our power (electricity) stems from copper. Simply said, no matter what you do to conserve copper, you are still going to need it and use it.
Explanation: