What are some possible explanations for the change in pheasant population between Point B and Point C?

What was the land like over 500 million years ago? what was under the sea?

The activity of the modern sample is 1.10 bq . how long does that measurement take?

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