A competitive.

B mutualistic.

C neutral.

D parasitic.

Cleaner fish feed on parasites in a shark's mouth and gills. Which of the following best describes the relationship between the cleaner fish and the shark?

A The new species population will consume the food that the rabbits eat.

B The population of the rabbits in the ecosystem will increase.

C The new species population will be consumed by the lynx.

D The population of the lynx in the ecosystem will increase.

Wildcats, such as the lynx, are predators of rabbits. Which will MOST likely occur if a new, aggressive species of wolf is introduced into the ecosystem that is a predator of the lynx?

SYMBIOSISLiving Together

Symbiotic relationships: any relationship in which two species live closely togetherMutualism: both species benefit Commensalism: one member benefits and the other is neither helped nor harmedParasitism: one organism lives on or inside another organisms and harms it.

As a “hermit” I find predators pesky to deal with on my long wanderings. So I load an anemone on my back and scuttle over to the neighboring reef-hey, it's always safer for me to travel with a living shield! And I suppose the anemone likes the idea of a change of

environment and more food to choose from.

The anglerfish's natural predatory skills makes it a choice host for me-there are plenty of nutrients for a little bacterium like me inside its body. Of course, the anglerfish couldn't get nearly enough food on its own, so I give off a nice gentle glow that it can use for the purpose of luring more prey.

I am a bacterium that lives on the roots of the soybean plant. I take nitrogen from the soil and make it available for the plant to grow. In return, the soybean plant provides me with carbohydrates for food. What type of symbiotic relationship am I in?

I am a barnacle living on the skin of a whale. I adhere to the outer layer of the whales thick skin, so I go wherever he goes. Living on the whale gives me a free ride to many more food sources that I would not have been able to get to without some help. The whale is not harmed by me since I do not interfere with his life, not irritate his skin, but I don't do anything to help him out. he doesn't seem to mind me hitching a ride, so it's cool. What type of symbiotic relationship am I in?

I am an algae, being held in place by a fungus. Together, we are called a lichen. Man, do we have it good. I feed him nutrients that I create through the process of photosynthesis. (That's right, I'm a producer). In return, he holds me in place so I can gather sunlight without being pushed around by the wind. We are like two best friends, helping each other out in need. What type of symbiotic relationship am I in?

I am a flea that lives on the back of a dog. I feed off of and find my home in the skin of many different animals. The dog does his best to try and get rid of me by scratching and biting, but I just keep digging further and further. What type of symbiotic relationship am I in?

I am an epiphyte plant that grows up on the tall plants of the rain forest. If it wasn't for my host plant I wouldn't be able to reach the sunlight due to the heavy foliage up above me. I grow on the branches of the tall trees, which me to bask in the sun. Lucky for my host, I don't interfere with his business. What type of symbiotic relationship am I in?