Which ocean zone is characterized by the absence of photosynthesis due to a lack of sunlight?

• A. Photic zone
• B. Aphotic zone
• C. Intertidal zone
• D. Neritic zone

Answer: (B)

Verified step by step guidance

1. Understand the concept of photosynthesis: Photosynthesis is the process by which plants, algae, and some bacteria convert sunlight into energy. It requires sunlight to occur.
2. Learn about the ocean zones: The ocean is divided into different zones based on depth and light availability. These include the photic zone, aphotic zone, intertidal zone, and neritic zone.
3. Define the photic zone: The photic zone is the upper layer of the ocean where sunlight penetrates, allowing photosynthesis to occur.
4. Define the aphotic zone: The aphotic zone is the deeper layer of the ocean where sunlight does not reach, making photosynthesis impossible due to the absence of light.
5. Compare the zones: Since the aphotic zone lacks sunlight, it is characterized by the absence of photosynthesis. The other zones, such as the photic zone, intertidal zone, and neritic zone, have varying degrees of sunlight and may support photosynthesis.