Answer:The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Recombination also can create a new DNA sequence (a new allele) for a specific gene through intragenic recombination.
Explanation:
Answer:
A. It can cause land subsidence
Explanation:
<span>Both simple and complex transposons.</span>
That <u>all cells contain nuclei </u>is NOT a component of the cell theory
Explanation:
Not all cells contain a nuclei. Cells are even categorized based on this attribute. Eukaryotic cells have a nucleus while prokaryotic cells do not. This property, therefore, cannot be used to categorize all cells. Prokaryotic cells have a nucleoid, which is not a true nucleus, but only a region in the cell where the genetic material of the cell can be found.
The other 3 choices are the universally-accepted tenets of the cell theory;
-cells are the basic unit of organization in organisms
-all living things are made of cells
-all cells come from pre-existing cells
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Answer:
a system formed by the interaction of a community of organisms with their physical environment.