Look at the graph. Changing Energy Needs
Hunter-gatherer
5,000
Early agriculture
12,000
Pre-Industrial
agriculture
26,000
Post-Industrial
agriculture
70,000
Modern Industrial
230,000
Energy use per person per day (kilocalories)
The greatest increase in energy use occurred between which two stages of society?
O early agricultural and pre-industrial agriculture
O pre-industrial agricultural and post-industrial agricultural
O hunter-gatherer and agricultural
post-industrial agricultural and modern industrial

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.