There are 3 types of polar bears: ones with thick coats, ones with thin coats and ones with medium coats. It is fall, soon to be
winter. The temperatures are dropping rapidly and the bears must be kept warm, or they will freeze to death. Many of the bears have had 4 cubs each but due to the extreme cold temperatures, some mothers only have 2 cubs left. What process is this an example of?
This process is an example of natural selection. You may know it as "survival of the fittest." This means that the organisms with the best traits for surviving will survive, while the others will unfortunately die off. However, this is good for a species because it means that the future offspring will likely become more and more adapted to their habitats and the world around them!
Oxygen is in group 16/VIA, which is called the chalcogens, and members of the same group have similar properties. Sulfur and selenium are the next two elements in the group, and they react with hydrogen gas (H2) in a manner similar to oxygen.
