Food Chains and Trophic Levels

The video tutorial covers the concept of food chains, explaining their definition and the role of trophic levels. It discusses two types of food chains: grazing and detritus. The tutorial also explains the energy transfer process within food chains, highlighting the 10% rule. Examples of food chains in different ecosystems are provided, and the video concludes with a summary of key concepts.

What is a food chain?

• A diagram showing energy flow in an ecosystem

• A network of interconnected food webs

• A series of organisms each dependent on the next as a source of food

• A list of organisms that consume each other

What is the first trophic level in a food chain?

• Autotrophs

• Secondary consumers

• Primary consumers

• Apex predators

Which of the following is a type of food chain?

• Grazing food chain

• Omnivorous food chain

• Carnivorous food chain

• Herbivorous food chain

What is a detritus food chain?

• A chain that includes only apex predators

• A chain involving only herbivores

• A chain starting from dead organic matter to microorganisms

• A chain starting from green plants to top carnivores

What is a food web?

• A list of all organisms in an ecosystem

• A single food chain in an ecosystem

• A network of interconnected food chains

• A diagram showing energy flow in a single organism

According to the 10% rule, how much energy is transferred to the next trophic level?

• 1%

• 50%

• 100%

• 10%

Why is energy lost at each trophic level?

• Due to energy being absorbed by the sun

• Because energy is converted into water

• Because animals burn calories for movement and metabolism

• Due to energy being stored as fat

Which of the following is an example of a food chain in a forest ecosystem?

• Algae → Fish → Bear

• Leaves → Caterpillar → Bird

• Plankton → Whale → Shark

• Grass → Deer → Wolf

What is the main reason for decreasing energy up the food chain?

• Energy is stored as fat

• Energy is lost as heat

• Energy is converted into water

• Energy is absorbed by the sun

What was the main focus of the recap in the class?

• Definition of food chains and trophic levels

• Types of food chains and examples

• Food webs and energy transfer

• All of the above