<em>Amoeba </em>is an example of an E<span>ukaryote.
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Answer:
So many factors influence the climate. Some of them are ocean currents, latitude, distance from the ocean, elevation, etc.
Explanation:
The distance from the ocean influences the climate of the place. If the place is located on the coast, the climate will be colder and humidity will be higher.
Thanks to ocean currents the temperature can be changed. Ocean currents can low the temperature but also make it very high.
Latitude has an influence also regarding the temperature. Elevation, as it gets higher, the air above is falling, so the pressure decreases.
Regarding all the factors above, we can say that New York has hot summers, with high humidity and very cold winters, full of snow. Close to the river, the ground is muddy and going to the mountains, the ground is getting rocky
Answer:
The correct answer is b. must be present in a population before natural selection can act upon the population
Explanation:
Genetic variation can be caused by mutation, recombination between chromosomes during meiosis and by fusion of two genetically different gametes during sexual reproduction.
This genetic variation is necessary for the evolution of any population. Natural selection acts on every individual and it decreases the frequency of those alleles that are not suited for the environment and increase the frequency of those alleles which helps the individual to survive in the changing environment.
Therefore genetic variation must be present in the population before natural selection act on the.
Calcium carbonate or silica
