A) Chromosomes pair in step 2.
B) Chromatids separate in step 5.
C) Chromosomes are replicated in step 1.
D) Chromosomes exchange genetic material in step 3.

Describe how alleles and genes are related

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 of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above