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Biology

GCSE · Edexcel

QuestionsFlashcards

Photosynthesis
Plant Structure
Transport in Plants
Plant Hormones
- Plant Hormones & Growth
  7
- Using Plant Hormones Commercially
  7

Transport in Animals
- The Need for Transport
  7
- Factors Affecting the Rate of Diffusion
  7
Respiration
- Respiration
  6
- Practical: Investigating Respiration
  5
Gas Exchange
Circulatory System
- The Blood & Blood Vessels
  6
- The Circulatory System
  8

The Carbon Cycle Flashcards

All 6 cards in this deck

Which process removes carbon dioxide from the atmosphere in the carbon cycle?: Photosynthesis, carried out by plants and algae.
Which three processes return carbon dioxide to the atmosphere in the carbon cycle?: Respiration, combustion and decomposition.
What is fossilisation in the carbon cycle?: Dead organisms that are not fully decomposed are compressed over millions of years to form fossil fuels, locking carbon away.
What is the role of decomposers (bacteria and fungi) in the carbon cycle?: They break down dead organisms and waste, releasing carbon dioxide by respiration and mineral ions into the soil.
Why must materials such as carbon and nitrogen be recycled between the biotic and abiotic parts of an ecosystem?: The supply of these elements is finite, so they must be released from dead organisms and waste to be reused by living organisms.
True or false? Burning fossil fuels is the only process that adds carbon dioxide to the atmosphere.: False. Respiration by all living organisms and decomposition also release carbon dioxide.