Hitting your head on the top of the car as you get into it:

what two systems are involved in this process?
how are they involved?

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Which process can increase the rate of greenhouse gas emissions into the atmosphere in response to a decrease in albedo

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian