Common abiotic factors that affect an ecosystem are
a: rocks, sunlight, fungi
b: soil, rocks, trees
c: air, trees, water
d: water, soil, sunlight

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.