Food Chain - Energy Flow in Ecosystems

The video explains the concept of food chains, illustrating how energy moves through an ecosystem. It provides an example of a marine food chain starting with phytoplankton and ending with sharks. The role of producers, such as algae and plants, which harness energy from the sun, is also discussed.

What is the primary function of a food chain in an ecosystem?

• To describe the habitat of each organism

• To illustrate how energy is transferred between organisms

• To list all species in an ecosystem

• To show the hierarchy of animals

In a simple marine food chain, which organism is typically at the beginning?

• Sharks

• Zooplankton

• Small fish

• Phytoplankton

Which of the following is NOT part of the described marine food chain?

• Whales

• Larger fish

• Small fish

• Zooplankton

What is the role of producers like algae in a food chain?

• They produce energy from sunlight

• They are at the top of the food chain

• They decompose organic matter

• They consume other organisms

Which of the following can directly harness energy from the sun?

• Sharks

• Algae

• Zooplankton

• Small fish