Answer:
Polar bears eventually becoming extinct
Explanation:
I’m not 100% sure if this is a scientific theory but I’m going with the big bang theory. The big bang theory is a scientist best guess on how the world came to be. A 2013 map of the background radiation left over from the Big Bang, taken by the ESA's Planck spacecraft, captured the oldest light in the universe. This information helps astronomers determine the age of the universe.
Answer: By designing new solar-powered ovens, by developing crops that need less water, by manufacturing new containers for storing water
One set of chromosomes would be Haploid