4. Scientists have most accurately determined the absolute ages of rock layers by A, factoring rates of sediment deposition.
B. using geologic columns.
C. using radiometric dating methods,
D. determining the rates of erosion.

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

How does deforestation affect the water cycle? a. it increases the amount of runoff b. it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.