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A BBC nature documentary series by David Attenborough that explores the growth, movement, reproduction and survival of plants using time-lapse photography. Learn about the adaptations, strategies and challenges of plants in different environments and ecosystems.
Photosynthesis (/ ˌ f oʊ t ə ˈ s ɪ n θ ə s ɪ s / FOH-tə-SINTH-ə-sis) [1] is a system of biological processes by which photosynthetic organisms, such as most plants, algae, and cyanobacteria, convert light energy, typically from sunlight, into the chemical energy necessary to fuel their metabolism.
Learn how plants and algae convert light energy into chemical energy during photosynthesis, and how this efficiency varies depending on factors such as light quality, intensity, and respiration. Compare the typical and optimal efficiencies of different plants and biofuel crops.
The indicator is used in photosynthesis and respiration experiments to find out whether carbon dioxide is being liberated. [1] It is also used to test the carbon dioxide content during gaseous exchange of organisms. When the carbon dioxide content is higher than 0.04%, the initial red colour changes to yellow as the pH becomes more acidic.
C 3 photosynthesis is the oldest and most common form. A C3 plant uses the Calvin cycle for the initial steps that incorporate CO 2 into organic material. A C4 plant prefaces the Calvin cycle with reactions that incorporate CO 2 into four-carbon compounds. A CAM plant uses crassulacean acid metabolism, an adaptation for photosynthesis in arid ...
In the dark, plants instead release sucrose into the phloem from their starch reserves to provide energy for the plant. The Calvin cycle thus happens when light is available independent of the kind of photosynthesis ( C3 carbon fixation , C4 carbon fixation , and crassulacean acid metabolism (CAM) ); CAM plants store malic acid in their ...
C4 plants are flowering plants that use a more efficient photosynthesis pathway than C3 plants. They belong to 19 families and 61 lineages, and include crops, weeds, and invasive species.
Learn about the specialized compounds produced by plants that are not essential for growth and development but are important for survival and interaction with the environment. Find out the history, types, functions and examples of secondary metabolites such as alkaloids, flavonoids and terpenoids.