6.6 limiting factor Flashcards
what increases along with photosynthesis?
light intensity
what prevents photosynthesis to take place in plants?
closed stomata
what is meant by limiting factor?
the factor that limits the reaction rate in any physiological process governed by many variables
what are examples of limiting factors?
sunlight; carbon dioxide; temperature; stomata
why is carbon dioxide a limiting factor?
due to its low natural concentration in the air
what temperature is a glasshouse often kept at and why?
optimum temperature (35–40ºC for photosynthesis); to encourage plants to grow strongly and faster
what are some controlled variables in glasshouses?
temperature, relative humidity, soil moisture and lighting, carbon dioxide concentration
why do plants sometimes stop photosynthesizing on a very hot and dry day?
stomata, which enables plants to photosynthesize, often closes during a very hot weather to prevent water loss, thereby slowing the photosynthesis process.
photosynthesis is the basic reaction that ____.
brings energy of the sun into ecosystems
why is photosynthesis essential?
for maintaining a constant global level of oxygen and carbon dioxide
