Ecosystem Components and Functions

The video tutorial from biologyexams4u.com discusses ecosystems, starting with the definition and origin of the term by AG Tansley. It explains the components of ecosystems, dividing them into biotic (living) and abiotic (non-living) components. Biotic components include producers, consumers, and decomposers, while abiotic components cover inorganic and organic elements and climatic factors. The tutorial also classifies ecosystems into natural (terrestrial and aquatic) and artificial types, providing examples for each category.

Who coined the term 'ecosystem'?

• E.O. Wilson

• Rachel Carson

• AG Tansley

• Charles Darwin

In a pond ecosystem, which of the following is NOT a living component?

• Turtles

• Algae

• Sunlight

• Water plants

What role do producers play in an ecosystem?

• They decompose organic matter.

• They synthesize their own food through photosynthesis.

• They consume other organisms.

• They provide shelter for animals.

Which of the following is a primary consumer in a pond ecosystem?

• Fish

• Protozoan

• Snake

• Frog

What is the main function of decomposers in an ecosystem?

• To create habitats

• To recycle nutrients

• To produce oxygen

• To provide energy

Which of the following is an inorganic component of an ecosystem?

• Lipid

• Protein

• Carbohydrate

• Water

What is a key physical factor in an aquatic ecosystem?

• Wind

• Dissolved oxygen

• Temperature

• Soil

Which of the following is a natural terrestrial ecosystem?

• Crop field

• Swimming pool

• Aquarium

• Desert

What type of ecosystem is an aquarium considered?

• Terrestrial

• Artificial

• Marine

• Natural

Which of the following is an example of a freshwater ecosystem?

• Savanna

• Ocean

• Desert

• Lake