In a controlled experiment, what is the experimental group compared to?
O
A. Source of error
O
B. Experimental group
O
C. Research question
O
D. Control group

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

How long does it take a skateboarder going 6.0 m/s to come to a complete stop if she slows down at a rate of 2.0 m/s^2

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?