In which layer would you find the most organic matter? a. bedrock
b. horizon c
c. subsoil
d. horizon a

Which is one example of a phenotypic change that is not genetic

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

Kidney stones are tiny crystals of calcium or magnesium that block the narrow sections of the excretory system. which symptoms would a person with kidney stones experience? a. inability to store urine; pain in the bladder b. inability to store urine; pain in the urethra c. reduced urine flow; pain in the bladder d. reduced urine flow; pain in the urethra