Which ecosystem does not show variations dependent upon geograhic location and rainfall?

Options

A. Marine ecosystem
B. Fresh water ecosystem
C. Desert ecosystem
D. Tropical ecosystem

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for an ecosystem that does not show variations based on geographic location and rainfall. This means we are looking for an ecosystem that remains relatively consistent regardless of where it is located on Earth or how much rain it receives.

2. **Identifying Ecosystems**: There are various types of ecosystems, such as terrestrial ecosystems (like forests, grasslands, deserts) and aquatic ecosystems (like freshwater and marine ecosystems). Each of these ecosystems can be influenced by geographic location and rainfall.

3. **Focusing on Marine Ecosystem**: The marine ecosystem is the largest ecosystem on Earth, covering about 70% of the planet's surface. It includes various habitats such as oceans, coral reefs, mangroves, and deep-sea environments.

4. **Characteristics of Marine Ecosystem**: The marine ecosystem is generally less variable than terrestrial ecosystems. It has a more stable environment in terms of temperature and salinity, and its organisms are adapted to these conditions. Unlike terrestrial ecosystems, marine ecosystems do not significantly vary with changes in geographic location or rainfall.

5. **Conclusion**: Therefore, the ecosystem that does not show variations dependent upon geographic location and rainfall is the **marine ecosystem**.