The diagram shows the life cycle of a fern. What does stage 2 show?
O A. A gamete-producing fern plant is flat and shaped like a heart.
B. A zygote forms when a sperm fertilizes an egg cell.
C. A spore grows into a mature gamete producing plant.
D. A mature spore producing fern plant has fronds and produces

and after water is usually warmed by the sun the water temperature raises and then evaporates .

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.