I'm pretty sure that cells contain genes inside them.
D looks like the oldest one because there is barley anything there. if not then I would do b
Your answer would be D. The possible combinations of alleles in offspring based on the parents genetic makeup. The punnet square is basically used to determine what the outcome of an offspring would be.
The tilt of the earth changing would affect the distance to the sun. This, the radiation from the sun, and resulting temperatures, would change as well.
