Ecology unit overview

Front

What is the primary reason humans cannot obtain nitrogen from the atmosphere by breathing?

Back

Humans lack the mechanism to break the triple bond of nitrogen (N≡N) between the nitrogen atoms.

Front

What role do bacteria play in the nitrogen cycle?

Back

Bacteria break down dead plants and animals, releasing nitrogen back into the atmosphere.

Front

Can plants and animals use nitrogen directly from the air?

Back

No, plants and animals cannot use nitrogen directly from the air.

Front

What are 'producers' in an ecosystem?

Back

Producers are organisms that produce energy for the food chain, primarily through photosynthesis.

Front

What gas is produced by plants and used by animals?

Back

Oxygen is produced by plants and used by animals.

Front

What is the process by which plants convert sunlight into energy?

Back

Photosynthesis.

Front

What is the significance of the nitrogen cycle in ecosystems?

Back

The nitrogen cycle is crucial for recycling nitrogen in various forms, making it available for use by living organisms.

Front

What are the two main types of organisms involved in nitrogen fixation?

Back

Bacteria and legumes.

Front

What is the difference between autotrophs and heterotrophs?

Back

Autotrophs produce their own food (e.g., plants), while heterotrophs consume other organisms for energy (e.g., animals).

Front

What is the role of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil.