A relationship between two organisms in which one organism benefits and the other is unharmed...

A tapeworm and a cat have this type of relationship.

What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

What type of symbiosis?  Skunks often live in burrows that have been dug and abandoned by woodchucks.  

Which symbols best describe parasitism?

Red-billed oxpeckers are birds that often feed on parasites that infest impala.  This is an example of _______.

A relationship between two organisms in which both organisms benefit. 

When a mosquito bites you, you are the __________ and the mosquito is the  ____________.

Mistletoe extracts water and nutrients from a spruce tree. The spruce tree is harmed. 

 The stork uses it saw-like bill to cut up the dead animals it eats. As a result, the dead animal carcass is accessible to some bees for food and egg laying. The relationship neither harms nor benefits the stork.

 A flea feeds on a mouse’s blood and harms the mouse.

 Hermit crabs live in shells made and then abandoned by snails. This relationship neither helps nor harms the snails.

Ostriches and gazelles feed next to each other. They both watch for predators and alert each other to danger. Because their visual abilities are different, they can identify threats that the other animal would not see as readily. 

Honey guide birds alert and direct badgers to bee hives. The badgers then expose the hives and feed on the honey first. Next the honey guide birds eat. Both species benefit. 

A cuckoo may lay its eggs in a warbler’s nest. The cuckoo’s young will knock the warbler’s eggs out of a nest and the warbler will raise the cuckoo’s young.

As bison walk through grass, insects become active and are seen and eaten by cowbirds. The relationship neither harms nor benefits the bison.

Ticks will feed on a deer’s blood and harm the deer.

A sparrow will build its nest under the nest of an osprey. The smaller birds get protection because other predators will not mess with the osprey. The osprey are not helped nor harmed by the sparrow.

Orchids grow inside a bromeliad plant. The orchid obtains water and nutrients from the bromeliad, but does not help or harm it.

A wasp lays its eggs on a caterpillar. When the wasp eggs hatch, the larva will eat the caterpillar and kill it. 

What type of symbiosis?
*Hermit crabs find shells left by snails that have died and move in.
*  Snails die and leave behind their shells.

Which of the following symbiotic relationships is considered parasitic? 

A lichen is a combination of fungus and algae that lives on the sides of trees, rocks, and other materials.  The fungus provides the algae with water and minerals and the algae uses the water and minerals to make food for both organisms.  What type of relationship does the lichen represent?