How long did it take for the population to double a third time?

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Linda and julia are trying to determine whether their ideas are scientific or pseudoscientific. linda's idea is free of bias. julia's idea gives the same result when tested repeatedly. which statement is correct about linda and julia's idea?

Which is abiotic? a. tree sap b. insect c. sunlight d. wood table