Understanding Food Webs

The video tutorial explains the concept of food webs, illustrating how energy and matter move through an ecosystem. It identifies key components such as producers, decomposers, primary consumers, and secondary consumers, using an aquatic ecosystem as an example. The tutorial emphasizes the roles of kelp and phytoplankton as producers, bacteria as decomposers, and various animals as consumers, highlighting the interconnectedness of these elements in maintaining ecological balance.

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

• To convert sunlight into energy

• To consume other organisms

• To recycle nutrients

• To decompose organic matter

Which of the following is an example of a producer in an aquatic ecosystem?

• Sea urchin

• Kelp

• Zooplankton

• Otter

What is the main function of decomposers in an ecosystem?

• To compete with producers

• To produce energy from sunlight

• To consume primary consumers

• To break down dead organisms

Which organism is identified as a decomposer in the food web?

• Fish

• Bacteria

• Sea urchin

• Phytoplankton

What do primary consumers primarily feed on?

• Secondary consumers

• Producers

• Decomposers

• Other primary consumers

Which of the following is a primary consumer in the food web?

• Bacteria

• Zooplankton

• Kelp

• Otter

What distinguishes secondary consumers from primary consumers?

• They produce their own food

• They are not part of the food web

• They feed on primary consumers

• They decompose organic matter

Which organism can be both a primary and secondary consumer?

• Fish

• Bacteria

• Phytoplankton

• Kelp

What is the role of arrows in a food web diagram?

• To highlight the most important species

• To represent the speed of energy transfer

• To show the size of organisms

• To indicate the direction of energy flow

How do decomposers contribute to the recycling of nutrients?

• By competing with producers

• By consuming primary consumers

• By producing energy from sunlight

• By breaking down dead matter