3 Marine ecology exam 2024

Front

What is the primary reason few plants are found on the bottom floor of the ocean?

Back

Sunlight doesn't reach the floor.

Front

What term describes organisms that are found hovering near the ocean floor?

Back

Demersal.

Front

Which of the following is not considered a major source of organic pollution: agricultural runoff, sewage, or power stations?

Back

Power stations.

Front

What is the term for a symbiotic relationship in which both organisms benefit?

Back

Mutualism.

Front

What do we call benthic animals that live in the substrate?

Back

Infauna.

Front

What is the role of sunlight in marine ecosystems?

Back

Sunlight is essential for photosynthesis, which supports plant life and the food web.

Front

Define the term 'benthic zone' in marine ecology.

Back

The benthic zone is the ecological region at the lowest level of a body of water, including the sediment surface and sub-surface layers.

Front

What is the difference between infauna and epifauna?

Back

Infauna are organisms that live within the substrate, while epifauna live on the surface of the substrate.

Front

What are the main types of marine pollution?

Back

The main types of marine pollution include organic pollution, plastic pollution, chemical pollution, and thermal pollution.

Front

Explain the concept of 'trophic levels' in marine ecosystems.

Back

Trophic levels represent the hierarchical levels in an ecosystem, where organisms are classified based on their feeding relationships.