The is a small vessel connecting the pulmonary trunk to the aorta in fetal circulation. A) ligamentum venosum B) ligamentum teres C) ductus venosus D) ductus arteriosus

DUCTUS ARTERIOSUS is the correct answer

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds