Unit 2 lesson 4 quiz

Name:

1. Tiny organisms called mites live in human eyelashes and feed on dead skin, without harming humans. Which type of symbiosis does this describe?

• predation
• mutualism
• parasitism
• commensalism

2. One relationship between organisms is predation. Which of these describes a predator?

• an organism eating another organism
• an organism eaten by another organism
• two organisms competing for resources

3.Which of the following is an example of commensalism? (One is helped, one is unaffected)

• A bird is hunted, killed, and eaten by a cat.
• A bird eats berries and spreads the seeds so the berries can have the opportunity to reproduce.
• A bird finds a hole in an existing tree and makes a nest in it. This does not harm the tree.

4. Choose the HOST in the scenario. A tapeworm lives in a house cat's body and takes most of the nutrients from the cat.

• tapeworm
• cat
• nutrients

5. Which type of symbiosis is described in this scenario? The clownfish lives in the sea anemone. The anemone provides the clownfish with a home, and the clownfish scares off potential predator fish.

• commensalism
• mutualism
• parasitism

6. __________ occurs when organisms fight for limited resources.

• cooperation
• competition
• mutualism

7. ________ describes the long term relationship between different species in a community.

• symbiosis
• competition
• parasitism

8. A leech attaches itself to a fish and feeds on the blood. The leech is a ______.

• host
• parasite

9. A cattle egret keeps close to a bison as it grazes because the bison stirs up a lot of insects as it walks. The egret gets food, but the bison is unaffected. What type of symbiosis is this?

• competition
• cooperation
• commensalism
• mutualism