Mutation is the primary cause of all genetic variation. Mutation is important as the first step in evolution, as it produces a new sequence of DNA for a particular gene, producing a new allele. Recombination, through intragenic recombination, may also generate a new DNA sequence (a new allele) for a particular gene.
Answer:
It is B
Explanation:
Because absorption occurs when the simple nutrient molecules that result from digestion are absorbed into blood or lymph.
Answer:
A
Explanation:
Heart cells are complex to find
Heart tissue is somewhat easy to find
Heart circulatory system is easy to find
If a man who has Type O blood, his biological children cannot be type AB.
A man who has type O blood cannot father a child with type AB blood, because he did not pass on the type O blood allele to all of his offspring.
