Bees pollinate flowers and also get nectar from them. Both species benefit.

Mistletoe takes water and nutrients from trees, harming the tree.

Heart worm develop in a dogs heart, the worms cause severe health problems then death.

Sharks will stalk and eat sea turtles.

Hermit crabs live in an abandoned snail shell, this neither harms or benefits the snails.

Some fish feed on parasites found on sea bass, both species benefit.

A flea feeds on a mouse's blood, harming the mouse.

Ostriches and gazelles eat next to eat other, both identify threats the others can't see.

A spider makes his web to catch unsuspecting insects.

Remoras attach to sharks feeding on their leftovers, this doesn't help or harm the shark.

Bison walk through the grass, insects are eaten by cowbirds, neither helping or hurting the bison.

Ticks feed on deer blood, harming the deer.

Honeybirds direct badgers to beehives, badgers eat the honey then leaves the rest for the birds.

Oxpeckers eat parasites off of rhinos

A lion chasing a gazelle...

Wasps lay eggs in a caterpillar, when the eggs hatch they eat the caterpillar from the inside-out.

A snake waits for a mouse to come close enough to eat.

Sparrows build nests near Osprey, because no predators will harm an osprey - only one organism benefits.

Shrimp and gobys live together, the gobys get the food and shrimp keep the burrow clean.

In this food web, which organism captures the Sun's energy?

Which organism is a consumer?

Which organism did the hawk's energy originate?

Which is the best way to describe the ecosystem for animals that live in Antarctica?

Which ecosystem would be the best to support a population of deer?

Which sentence best describes how produces depend on decomposers?

What kind of change do birds make to their ecosystem in order to survive?

What is the main cause of extinction?

Water in the pond dried up. Which organism in the pond would still be able to take in oxygen?

Which organism in the pond changes it's physical features and food source when it becomes an adult?

Which organism uses sunlight to produce food that others eat?

How does a caterpillar obtain it's energy from the sun?

What do you think would happen to plants if the sun did not shine for a long time?

The population of rabbits has increased, how will this affect the wolf population

What is happening to the leaf in the picture?