Which group of organisms primarily conducts photosynthesis, converting light energy into chemical energy?

• A. Animals that ingest organic molecules for energy
• B. Plants, algae, and cyanobacteria
• C. Archaea that rely mainly on chemosynthesis in extreme environments
• D. Fungi and most bacteria that obtain energy by decomposing organic matter

Answer: (B)

Verified step by step guidance

1. Understand the process of photosynthesis: it is the conversion of light energy into chemical energy, typically stored in glucose molecules.
2. Identify which organisms have the cellular structures necessary for photosynthesis, such as chloroplasts or similar pigments like chlorophyll.
3. Recognize that plants, algae, and cyanobacteria contain chlorophyll and perform photosynthesis to produce their own food.
4. Contrast this with animals, fungi, and many bacteria, which obtain energy by consuming organic molecules or decomposing matter rather than producing it through photosynthesis.
5. Conclude that the group primarily responsible for photosynthesis includes plants, algae, and cyanobacteria.