Photosynthesis and limiting factor

Cards (28)

  • What process do plants need to survive?
    Photosynthesis
  • What are the four main factors affecting photosynthesis?
    Light intensity, temperature, CO2 concentration, chlorophyll
  • What role does chlorophyll play in photosynthesis?
    It absorbs light energy needed for photosynthesis
  • How does a lack of chlorophyll affect photosynthesis?
    It reduces the rate of photosynthesis
  • What can cause variations in chlorophyll levels in plants?
    Disease, environmental stress, lack of nutrients
  • What are limiting factors for photosynthesis?
    Light, carbon dioxide, and temperature
  • On which axis is light intensity plotted in photosynthesis graphs?
    X-axis
  • What happens to the rate of photosynthesis as light intensity increases?
    It increases until it plateaus
  • What does it mean when the graph of photosynthesis plateaus?
    Another factor is limiting photosynthesis
  • How does carbon dioxide concentration affect photosynthesis?
    More CO2 increases the rate until it plateaus
  • How does temperature initially affect the rate of photosynthesis?
    It increases the rate due to faster enzyme activity
  • What happens to enzymes at high temperatures during photosynthesis?
    They begin to denature and lose function
  • At what temperature do enzymes involved in photosynthesis fully denature?
    About 45°C
  • What does a graph with two curves indicate in photosynthesis experiments?
    Different limiting factors in each experiment
  • How can farmers create optimal conditions for photosynthesis?
    By using greenhouses, artificial light, and CO2
  • What is one benefit of using greenhouses for crops?
    They trap heat and protect from pests
  • Why might farmers use fertilizers in greenhouses?
    To ensure plants have essential minerals
  • What must farmers consider when increasing production costs for crops?
    The cost versus the expected yield increase
  • Where can students find additional resources related to these topics?
    On the website cognito.org
  • What types of resources are available on cognito.org?
    Videos, questions, flashcards, and progress tracking
  • What is the role of chloroplasts in photosynthesis?
    They contain chlorophyll for light absorption
  • Why is light energy important in photosynthesis?
    It powers the process of converting CO2 and water
  • How does environmental stress affect chlorophyll production?
    It can reduce chlorophyll levels in plants
  • What is the relationship between temperature and enzyme activity in photosynthesis?
    Higher temperatures increase activity until denaturation
  • What does the plateau in photosynthesis graphs indicate?
    Another factor is limiting the rate
  • How do paraffin heaters benefit greenhouse conditions?
    They release heat and carbon dioxide
  • How do pests and pathogens affect crop yield?
    They can reduce the overall yield of crops
  • What economic considerations do farmers face in crop production?
    Balancing costs against expected yield increases