Food Web and Energy Flow Concepts

The video tutorial explains the concept of interdependence and food webs, highlighting how organisms are connected through food chains. It introduces the idea of trophic levels, where energy flows from producers to primary and secondary consumers. The tutorial also discusses how energy is lost at each trophic level through respiration and excretion, shaping the pyramid of biomass. The importance of understanding energy flow and interdependence in ecosystems is emphasized.

What does a food web illustrate?

• The migration patterns of animals

• The habitat of organisms

• The diet of a single organism

• The interconnections of multiple food chains

What is interdependence in the context of a food web?

• The dynamic relationship between all living organisms

• The competition between predators

• The reliance of organisms on non-living things

• The isolation of species in an ecosystem

Which level of the food chain consists of producers?

• Tertiary consumers

• Secondary consumers

• Producers

• Primary consumers

Which of the following is a primary consumer?

• Rabbit

• Fox

• Oak tree

• Owl

What is the main source of energy for producers?

• Air

• Water

• Soil

• Sunlight

In a food web, how does energy flow?

• From predators to prey

• From what is eating to what is being eaten

• From what is being eaten to what is eating

• In a circular motion

What happens to energy as it moves up a food chain?

• It is lost

• It increases

• It remains constant

• It is recycled

Which process is NOT a way energy is lost in a food chain?

• Respiration

• Excretion

• Photosynthesis

• Heat production

What does the pyramid of biomass represent?

• The number of organisms at each level

• The energy flow between levels

• The mass of living tissue at each trophic level

• The speed of energy transfer

Why does the pyramid of biomass have a pyramid shape?

• Because there are more producers than consumers

• Because organisms grow larger at each level

• Because energy is lost at each level

• Because energy is gained at each level