Bacteria were first observed by the Dutch microscopist Antonie van Leeuwenhoek in 1676
<u>-TheUnknownScientist</u>
A) Crossing over is the mechanism of genetic variation that results from the exchange of gene segments between non-sister chomatids.
<span>the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other.</span>
Wheres the picture for this
Answer:
A
Explanation:
I know this because I just took the test and got it right.
