Organization of Living Things

1
Organization of Living Things

• Roles for Plants and Animals

2
How Do Living Things Use Air?

• Plants give off oxygen, a gas that animals need.
• Animals take in oxygen made by producers.
• Animals give off carbon dioxide, a gas that
  plants need.

3
How Do Living Things Use Air?

• The carbon dioxide and oxygen cycles are the
  process of trading oxygen and carbon dioxide.
• Animals breath in oxygen and breath out carbon
  dioxide.

4
How Do Living Things Use Air?

• Plants take in carbon dioxide and give off
  oxygen.
• The worlds largest oxygen producing organisms
  are trees.
• The most important source of oxygen is algae,
  which make more oxygen than all the land plants
  in the world.

5
What Do Populations Depend On?

• Animals that hunt for food are called predators.
• The animals that predators eat are called prey.
• Animals that eat dead animals are called
  scavengers.

6
How Can Populations Affect Each Other?

• The clownfish is covered with slime that protects
  it from the anemone.
• The anemone depends on the clownfish for food.
• Cattle egrets follow cows to find food.

7
How Can Populations Affect Each Other?

• An organism that lives on or inside another
  organism is called a parasite.
• The organism the parasite lives with is called
  the host.
• Fleas are parasites on a dog.

8
How Do Animals Help Plants Reproduce?

• When acorns fall close to oak trees, there is not
  enough light for the seeds to grow.
• Squirrels help oak trees reproduce by burying
  acorns far from the tree.