If you spent 1 second with each person on Earth, from the time you were born until the time you die, with no breaks...how long would you have to live in order to accomplish this? Just type in the number of the age you would have to live to.

the cell theory states that all living things including animals, as well as plants, are made of cells.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

i think its white blood cells

i hope this