What do you know about Ecological Relationships?

Ticks carry bacteria that cause Lyme disease. Ticks do not get Lyme disease, but they can transfer the bacteria to humans, who can get the disease. Which of the following statements best describes the relationships among the bacteria, the ticks, and the humans?

• The relationship between the bacteria and the ticks is competition, and the relationship between the ticks and the humans is predation.

• The relationship between the bacteria and the ticks is competition, and the relationship between the ticks and the humans is parasitism.

• The relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is parasitism.

• The relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is predation.

Tapeworms are sometimes found in the small intestines of sheep. A tapeworm attaches to the intestinal wall using suckers and then absorbs nutrients from the sheep’s intestine. Which of the following terms describes the relationship between the tapeworm and the sheep?

• competition

• herbivore

• parasitism

• predation

Many lichens are composed of fungi and algae. The fungi get sugars from the algae, and the algae get water, minerals, and proteins from the fungi. Which of the following terms best describes the relationship between the organisms in the lichens?

• commensalism

• competition

• mutualism

• . parasitism

The ecological relationship between a hawk and a rabbit is the same type of relationship as that between what?

• a tick and a deer

• a frog and an insect

• a mouse and a chipmunk

• a bee and a flowering plant.

When a symbiotic relationship helps one organism and hurts the other it is an example of:

• mutualism

• competition

• commensalism

• parasitism

Leeches have been used for medicinal purposes. The leech benefits by getting blood (food) from humans. How do humans benefit from the mutualistic relationship?

• The leech helps improve blood flow in the human.

• The leech reduces the human chance of a bacterial infection.

• The leech improves the cosmetic look of the human.

• The leech do not benefit human.

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 use the water and minerals to make food for both organisms. What type of relationship does the lichen represent?

• parasitism

• competition

• commensalism

• mutualism

Which of the following are NOT an example of a symbiotic relationship?

• A bacterial infection

• Worm living in a cow's intestine

• A frog eating insect

• A hen caring for her chicks

How does a crocodile benefit from a bird eating from its mouth?

• It gets its teeth cleaned

• It has no benefit at all

• It gets to eat the bird

• It gets a defense against flies

An animal that kills and eat other animal is called predator. An animal that is killed and eaten by its predator is called what?

• prey

• herbivore

• victim

• omnivore