Ecosystem Relationships and Energy Flow

The video tutorial covers the main types of feeding relationships: parasite-host, producer-consumer, and predator-prey. It explains the roles of different consumers such as herbivores, carnivores, omnivores, decomposers, and scavengers. The concept of trophic levels is introduced, illustrating how energy and biomass decrease as one moves up the food chain. The video also discusses food webs, which show all possible feeding paths in an ecosystem, and prepares students for a review worksheet and a food web project.

Which of the following is an example of a parasite-host relationship?

• A lion hunting a zebra

• A tapeworm in a human's digestive tract

• A vulture feeding on carrion

• A raccoon eating both plants and animals

What type of consumer is a tortoise?

• Herbivore

• Carnivore

• Omnivore

• Scavenger

Which of the following organisms is a decomposer?

• Raccoon

• Lion

• Turkey vulture

• Bacteria

What is the primary role of decomposers in an ecosystem?

• To hunt prey

• To produce energy from sunlight

• To consume both plants and animals

• To break down dead organic matter

What is a trophic level?

• A type of consumer

• A step in the transfer of energy within an ecosystem

• A type of producer

• A type of decomposer

In a food chain, which level receives the most energy?

• Tertiary consumers

• Primary consumers

• Producers

• Secondary consumers

What percentage of energy is typically transferred from producers to primary consumers?

• 1%

• 10%

• 50%

• 100%

Which of the following best describes a food web?

• All possible paths of feeding relationships

• A single path of energy flow

• A list of all consumers in an ecosystem

• A diagram showing only producers

What is biomass in the context of trophic levels?

• The number of predators in an ecosystem

• The energy produced by autotrophs

• The measurable organic matter within a trophic level

• The total number of organisms

Which of the following is a quaternary consumer?

• A plant

• A top carnivore

• A decomposer

• A herbivore