Your answer is B.
It's called an occluded front where the cold air meets the warm air underneath it. Hot air rises over cold air. :) Hope this helps you.
The genetic code is considered universal because the same four nucleotide bases are used by all known organisms
Natural selection provides the outline of an explanatory theory." Biologists consider it to be a scientific fact that evolution has occurred in that modern organisms differ from past forms, and evolution is still occurring with discernible differences between organisms and their descendants.
