Which of the following is the most important process specific to land-dwelling plants? a. production of photosynthetic pigments b. conservation of water c. exchange of gas d. presence of cell walls

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.