Phototrophs

Definition

Phototrophs are organisms that obtain energy from light to carry out cellular processes. They use photosynthesis to convert light energy into chemical energy.

5 Must Know Facts For Your Next Test

1. Phototrophs include bacteria, algae, and plants.
2. They possess pigments like chlorophyll to capture light energy.
3. Cyanobacteria are a type of phototrophic prokaryote important in nitrogen fixation.
4. Phototrophs play a crucial role in the carbon cycle by converting carbon dioxide into organic compounds.
5. They can be found in diverse environments ranging from freshwater and marine ecosystems to soil and extreme habitats.

Review Questions

• What is the primary source of energy for phototrophs?
• Name two types of organisms that are classified as phototrophs.
• How do phototrophs contribute to the carbon cycle?

Related terms

Chemotrophs: Organisms that obtain energy by oxidizing inorganic or organic chemicals.

Photosynthesis: The process used by phototrophs to convert light energy into chemical energy stored in glucose.

Chlorophyll: A pigment found in phototrophs that is essential for absorbing light during photosynthesis.