Cadena trófica

The video explains how energy is transferred through living things in an ecosystem, using a simple marine food chain as an example. It starts with phytoplankton, which are consumed by zooplankton, then small fish, larger fish, and sharks. At the base of all food chains are primary producers like algae and plants, which derive their energy directly from the Sun.

What is the primary focus of energy transfer in ecosystems?

• The flow of nutrients

• The movement of water

• The transfer of energy through living organisms

• The cycle of carbon dioxide

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

• Zooplankton

• Phytoplankton

• Small fish

• Sharks

Which of the following is eaten by small fish in a marine food chain?

• Sharks

• Zooplankton

• Phytoplankton

• Larger fish

What is the role of primary producers in a food chain?

• They decompose organic matter

• They are at the top of the food chain

• They consume other organisms

• They produce energy from the Sun

Which of the following are examples of primary producers?

• Zooplankton and small fish

• Larger fish and sharks

• Algae and plants

• Phytoplankton and zooplankton