Answer: crossing over allows for genetic variation
Explanation:
crossing over is the exchange of genes between two chromosomes which ends up resulting in non-identical chromatids that comprise the genetic material of gametes (sperm and eggs).
Basically crossing over makes the chromatids that are held together by a centromere, no longer identical to eachother which creates genetic variation.
Solar power/energy or hydroelectric plants
the answer is a because if the model is based on experimental data it wont be good unless it has been tested.
C. Ball and socket joints
Just took the test hope this helps :)
