True or false: in the example described the red amoeba survive the catastrophic event and all future generations of amoebas are red because the red amoebas had a higher reproductive rates than the blue ones

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures