The Answer would be A or D but I am going with A if you come up if the right answer good for you
B- Electron transport chain
The Rocky Mountains formed 80 million to 55 million years ago during the Laramide orogeny, in which a number of plates began sliding underneath the North American plate. ... Since then, further tectonic activity and erosion by glaciers have sculpted the Rockies into dramatic peaks and valleys.
Most of the present physiographic regions of the Great Plains are a result of erosion in the last five million years. Widespread uplift to the west and in the Black Hills caused rivers draining these highlands to erode the landscape once again and the Great Plains were carved up.
And endocrine cell is an outer cell i think and a target cell is an antibody which helps attack viruses
Warm water holds less oxygen
