Ecology Insights: Food Webs and Organism Roles

Mr. Rock reviews key concepts in ecology, focusing on food webs, roles of organisms in ecosystems, energy transfer through trophic levels, and symbiotic relationships. He explains the importance of understanding food webs, the roles of producers, consumers, and decomposers, and the rule of 10% in energy transfer. The video also covers different types of symbiotic relationships, including predation, parasitism, commensalism, and mutualism.

What does an arrow in a food web represent?

• The color of the organism

• The direction of energy flow between organisms

• The size of the organism

• The speed of the organism

Which of the following is an example of a producer?

• Lion

• Earthworm

• Plant

• Mouse

What is the primary role of decomposers in an ecosystem?

• To produce energy through photosynthesis

• To consume other organisms for energy

• To break down dead organic material

• To compete with producers for sunlight

According to the rule of 10%, if there are 10,000 plants, how many primary consumers can they support?

• 10

• 10,000

• 1,000

• 100

What happens to energy as it moves up the trophic levels?

• It remains the same

• It increases

• It is lost

• It doubles

Which of the following is an example of predation?

• A clownfish and a sea anemone

• A remora fish on a shark

• A wood tick on a dog

• A lion eating a gazelle

In parasitism, what is the relationship between the parasite and the host?

• Both benefit

• The parasite benefits, the host is harmed

• Neither is affected

• Both are harmed

What is the relationship called when one organism benefits and the other is unaffected?

• Mutualism

• Predation

• Parasitism

• Commensalism

Which symbiotic relationship benefits both organisms involved?

• Mutualism

• Commensalism

• Parasitism

• Predation

What is an example of mutualism?

• A remora fish and a shark

• A wood tick and a dog

• A lion and a gazelle

• A clownfish and a sea anemone