Ch. 8 Sec. 2 Notes

Multiple Choice

Why is it important to understand how species interact with each other in an ecosystem?

• It helps us predict weather patterns

• It allows us to understand ecosystem stability and biodiversity

• It is only useful for studying plants

• It makes it easier to find new species

Open Ended

Explain the difference between an organism's niche and its habitat, and why understanding this distinction is important in ecology.

Multiple Choice

Which of the following best describes symbiosis?

• A relationship where two different organisms live in close association and at least one benefits.

• A relationship where only one organism benefits and the other is always harmed.

• A relationship where organisms compete for resources.

• A relationship where organisms never interact.

Open Ended

List and briefly describe the five major types of species interactions.

Multiple Choice

Which types of species interactions result in both species benefiting?

• Mutualism

• Competition

• Predation

• Commensalism

Fill in the Blanks

These categories are based on whether each species causes

or harm to the other species in a given relationship.

Open Ended

Explain how niche overlap leads to competition between species. Use examples from the images to support your answer.

Fill in the Blanks

Indirect competitors are species that compete for the same food source but do not

come into contact with each other.

Multiple Choice

Which adaptation helps species reduce competition when their niches overlap?

• Dividing up the niche in time or space

• Increasing competition

• Expanding their niche

• Ignoring other species

Open Ended

Explain how niche restriction can affect the distribution of closely related species within a habitat.

Multiple Choice

Based on the diagram, what happens to the niche size of Chthamalus stellatus when competition is present?

• It increases

• It decreases

• It stays the same

• It disappears

Multiple Select

Which of the following are mechanisms organisms have evolved to avoid or defend against predators?

• Camouflage

• Warning coloration

• Mimicry

• All of the above

Fill in the Blanks

The population sizes of the lynx and snowshoe hare tend to increase and decrease in

patterns.

Open Ended

Describe the relationship between a parasite and its host, and provide two examples of parasites.

Fill in the Blanks

A parasite spends some of its life ___ or ___ the host.

Multiple Select

Which of the following are examples of mutualistic relationships?

• Bacteria in human intestines

• Remoras and sharks

• Parasites and hosts

• Bees and flowers

Open Ended

Explain how mutualism differs from parasitism and commensalism. Use examples from the slides to support your answer.

Multiple Choice

Which type of symbiotic relationship involves one organism benefiting while the other is unaffected?

• Parasitism

• Mutualism

• Commensalism

• Competition

Open Ended

What is symbiosis?

Open Ended

What is the difference between a niche and a habitat?

Open Ended

Reflecting on today's lesson, what questions do you still have about how species interact with each other in their environments?

Multiple Choice

How is a niche different from a habitat in an ecosystem?

• A niche is a location, while a habitat is a role.

• A niche is an organism's pattern of use of its habitat, while a habitat is a location.

• A niche is a type of species, while a habitat is a community.

• A niche is the physical environment, while a habitat is the job of a species.