Answer:
a.)
Explanation:
The dense cold salty water from the south sinks to the bottom of the ocean.
Well my family has a genetic condition but i wouldnt want to know about my chances of catching it. I would rather remain blind to how long and enjoy how long my life lasts. I wouldnt want to know because then I would feel like I have a time limit. By not knowing I can enjoy every breath i take. Also by not knowing I wont have to worry my kids about me. Like last time I had a cold they called a doctor and scheduled an appointment just for a few sneezes and coughs. Also if I told my kids then they would feel like they have a time limit on their lives to. I am just going to live my life to the best. Plus if anything does happen to me I am only like two minutes away from a hospital.
The prenatal circulation of blood is different than the postnatal circulation, mainly because the lungs are not in use. The fetus obtains oxygen and nutrients from the mother through the placenta and the umbilical cord. Blood from the placenta is carried to the fetus by the umbilical vein.
The old moleule serves as a template.