Photosynthetic organisms in aquatic biomes tend to live near the surface, as there is more light availability. Is this constraint of light availability a physical or chemical factor?

• A. Physical.
• B. Chemical.
• C. Both.
• D. Neither.

Answer: (A)

Verified step by step guidance

1. Begin by understanding the role of light in photosynthesis. Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. Light is essential for this process.
2. Consider the environment of aquatic biomes. In these environments, light penetration decreases with depth due to absorption and scattering by water and other particles. This affects the availability of light for photosynthetic organisms.
3. Identify the nature of light availability. Light is a form of electromagnetic radiation, which is a physical phenomenon. It is not a chemical substance or reaction.
4. Evaluate the options given in the problem. Since light availability is related to the physical presence and intensity of light, it is a physical factor.
5. Conclude that the constraint of light availability for photosynthetic organisms in aquatic biomes is primarily a physical factor, as it pertains to the physical presence and intensity of light.