The theory of plate tectonics is about the .

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

What are the steps of how energy is transformed in plant cells?

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z