Ecosystems: Energy and Relationships

In a food web, what is the primary role of herbivores?

• To consume producers

• To produce energy through photosynthesis

• To decompose organic matter

• To prey on carnivores

If an organism uses photosynthesis to make its energy, it is a _____.

• tertiary consumers

• producer

• primary consumer

• secondary consumer

Which of the following is an example of mutualism?

• A hawk preying on a mouse

• A bee pollinating a flower

• A lion hunting a zebra

• A fungus decomposing a log

What is the primary benefit of mutualistic relationships in ecosystems?

• They reduce biodiversity

• They lead to the extinction of weaker species

• They help maintain ecological balance

• They increase competition among species

Which of the following interactions is an example of a biotic factor affecting an abiotic factor?

• Wind dispersing seeds across a field

• A tree providing shade and reducing soil temperature

• Rainfall increasing the water level in a pond

• Sunlight enabling photosynthesis in plants

What is the definition of the word consumer?

• An animal that eats only plants
• An animal that eats other animals
• An organism that obtains energy by feeding on other organisms.
• The transfer (movement) of energy.

In an ecosystem, how are food webs and food chains different?

• Food webs show the relationship between many different food chains in a single ecosystem. Food chains show one path of energy transfer in an ecosystem.

• Food chains show the relationship between many different food webs in a single ecosystem. Food webs show one path of energy transfer in an ecosystem

• Food webs rarely begin with plants, and food chains begin with animals.

• Food webs begin with animals, and food chains begin with plants.

Which two organisms compete for the rabbit for energy?

• Mouse and Tree

• Owl and Goat

• Wildcat and Jackal

• Lion and Jackal

The amount of energy that usually transfers from one trophic level to the next...

• 10%
• 20%
• 80%
• 50%

What may happen if the snowshoe hare was removed from the food web pictured?

• The insects in the habitat would increase.
• The shrew population would decrease due to being only hawk food source.
• The willow tree population would decrease.
• Foxes would dies due to no food source.