10
3 + 7 = 10
check: 10 - 3 = 7
Glucose and amino acids move in and out of cells via facilitated diffusion.<span />
Photosynthesis:
CO2 + H2O + light = carbohydrate (like glucose) + O2
* left side of the reaction are reactants, right side is products..
R,P,P,R
electron transport chain transfers electrons
E,E,K
Answer:
Crop failure and disease was a constant threat to life. Wheat bread was the favorite staple, but most peasants lived on Rye and Barley in the form of bread and beer. These grains were cheaper and higher yield, though less tasty.