What is the difference between prokaryotic and eukaryotic cells? A. Eukaryotic cells do not have membrane-bound organelles, but prokaryotic cells do.
B. Organisms with eukaryotic cells are always multicellular, but organisms with prokaryotic cells are not.
C. Prokaryotic cells do not have a nucleus, but eukaryotic cells do.
D. Prokaryotic cells always have cell walls, but eukaryotic cells do not.

Apopulation of bears has genetic diversity. some of the bears have an allele that gives them thicker fur. due to climate change, the winters have gotten colder in their habitat. now the bears with thicker fur are becoming more common in the population. a.) which type of bear is selected for in the coldest ecosystem? b.) what must be the other allele for the type of fur, and what term would you use to describe the fact that the allele is becoming less common in the colder climate? c.) describe the change in the bear population in terms of changing allele frequencies and phenotypes d.) is this an example of natural selection