Which of the following are the primary photosynthesizers in terrestrial ecosystems?

• A. Cyanobacteria
• B. Algae
• C. Green plants
• D. Fungi

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the concept of photosynthesis. Photosynthesis is the process by which organisms convert light energy into chemical energy stored in glucose. This process primarily occurs in organisms that contain chlorophyll, a pigment that captures light energy.
2. Step 2: Identify the primary photosynthesizers in terrestrial ecosystems. Terrestrial ecosystems are land-based environments, and the primary photosynthesizers are organisms that perform photosynthesis to produce energy and oxygen.
3. Step 3: Evaluate the options provided. Cyanobacteria and algae are photosynthetic organisms, but they are primarily found in aquatic ecosystems. Fungi do not perform photosynthesis as they lack chlorophyll; they obtain energy by decomposing organic matter.
4. Step 4: Focus on green plants. Green plants contain chlorophyll and are the dominant photosynthesizers in terrestrial ecosystems. They play a crucial role in converting sunlight into energy and supporting the food chain.
5. Step 5: Conclude that green plants are the correct answer because they are the primary photosynthesizers in terrestrial ecosystems, unlike cyanobacteria, algae, or fungi.