20 points
which factors during meiosis provide the most significant contributions to genetic diversity?

structure of the spindle fibers in the sister chromatids
retention of two sister chromatids in the daughter cells
crossing over and two possible orientations of each homologous pair
development of haploid nuclei and cytoplasm division during cytokinesis

Explain the difference between incomplete dominance and codominance

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone