Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Physical and chemical environmental
, like intensity and position
light in relation to plant,
gravitational force, temperature,
pressures and chemical
composition the soil and of
atmosphere, can also influence
growth and development of .