Metabolic Scaling: How to Compare Animal Energy Needs
A horse needs more food in total than a hummingbird. Per gram of body mass, however, the hummingbird uses energy much faster under comparable active conditions. During a cold night or an energy shortage it may enter torpor, lowering body temperature and metabolic rate. Metabolism continues. Fasting
Photosynthetic Light Reactions: ATP, NADPH and Oxygen
A leaf appears green because it reflects and transmits a larger fraction of green light than of much of the red and blue light it receives. That does not mean green light is unused. Some green light is absorbed and can drive photosynthesis, including in deeper leaf layers. Distinguish a lower absorp
