Question

Why do plants not grow in the bottom of the oceans?

a. Plants need oxygen and there is none in the ocean floors.
b. Plants need warm waters and it is too cold in ocean floors.
c. Plants need carbon dioxide and it does not reach the ocean floors.
d. Plants need sunlight and sunlight does not reach the ocean floors.

Answer 1

Plants do not grow at the bottom of the ocean because they need sunlight for photosynthesis, which is unavailable in those depths, making the correct answer d) Plants need sunlight and sunlight does not reach the ocean floors.

Step-by-step explanation:

The reason why plants do not grow at the bottom of the oceans is because they need sunlight for photosynthesis, and sunlight does not reach the ocean floors. In aquatic ecosystems, sunlight is absorbed by water, plants, suspended particles, and microorganisms. As a result, towards the bottom of oceans, sunlight is unavailable, and plants that require photosynthesis cannot survive. This means that option d, 'Plants need sunlight and sunlight does not reach the ocean floors,' is the correct answer. Aquatic plants typically have photosynthetic tissue near the surface, and some organisms in environments like hydrothermal vents may utilize inorganic chemicals for energy, due to the absence of light for photosynthesis.