Why is ice a physical change

As , plants meet their needs for making food from air, soil, water, and the sun's energy in a process called there are plants called grow high in trees without here are words to put in the blanks. 1.) producers 2.) consumers 3.) chloroplasts 4.) epiphytes

What's the waste product of electrons and pyruvate combining in fermentation?  

What goes in and out of a cell respiration?