Answer:I would benefit off my problem if I handled it.It would help me and help other if they have the same problem.
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Answer:
Ca has 20 protons, so neutral it would have 20 electrons, but according to the charge, 2 electrons have been lost.
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They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars
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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.
The weathering process occurs when rocks are exposed to the hydrosphere (water) and atmosphere (air).
