Biomass

The video explains the concept of biomass, which is the total mass of living organisms in a specific area or ecosystem. It introduces the biomass pyramid, illustrating how biomass decreases at each level of a food chain. The video highlights that Antarctic krill is believed to have the largest biomass on Earth, estimated at about 500 million tons, which is five times the total biomass of humans.

What does the term 'biomass' refer to in an ecosystem?

• The total mass of living organisms in an area

• The energy flow in a food chain

• The number of species in an area

• The diversity of plants in a region

What does a biomass pyramid illustrate?

• The energy levels in a food chain

• The number of predators in an ecosystem

• The biomass at each level of a food chain

• The diversity of species in a habitat

How does biomass typically change as you move up a food chain?

• It increases

• It remains constant

• It decreases

• It fluctuates randomly

Which species is believed to have the largest biomass on Earth?

• Antarctic krill

• African elephants

• Amazon rainforest trees

• Blue whale

How does the biomass of Antarctic krill compare to that of humans?

• It is half the biomass of humans

• It is equal to the biomass of humans

• It is five times the biomass of humans

• It is ten times the biomass of humans