Ecosystem Relationships and Interactions

What are biotic factors in an ecosystem?

• Plants, animals, and other organisms

• Sunlight, water, and soil

• Temperature and air

• Rocks and minerals

Which of the following is an example of a symbiotic relationship?

• A hawk catching a mouse

• Two flowers competing for sunlight

• Bees pollinating flowers

• A tick feeding on a dog

What happens in a mutualistic relationship?

• One organism benefits while the other is harmed

• Both organisms benefit

• One organism benefits while the other is unaffected

• Both organisms are harmed

What is the sequence of organization in an ecosystem from simplest to most complex?

• Individual, population, community, ecosystem

• Ecosystem, community, population, individual

• Community, ecosystem, individual, population

• Population, individual, ecosystem, community

How can a drought affect an ecosystem?

• It only affects the plants

• It affects plants, which in turn affects animals and predators

• It only affects the animals

• It has no effect on the ecosystem

Match the following

• one organism benefits at the expense of another

• competitive relationship

• one organism benefits without affecting the other

• mutualism

• both species benefit from the interaction

• predatory relationship

• two species compete for the same resources

• commensalism

• one organism benefits while the other is harmed

• parasitic