By the type of level it has, yy YY Yy y .
Answer:
crossing over
Explanation:
Crossing over is where homologs can exchange DNA which leads to genetic variation
Complex molecules are made up of other elements bonded with carbon. Carbon is able to bond with other molecules so easily because it has four valence electrons.
The convolutions in the cerebrum are important as they increase the surface area.
All the Best. :D