Question

All the ecosystem taken together in a geographical area form a bigger unit is known as ________.

Answer 1

Different parts of the world are inhabited by different species of plants and animals. The major terrestrial biotic communities of the world each comprising a characteristic array of plant and animal life, are called biomes. They are the largest ecological units. The biome contain many ecosystems but are defined by climate.

So, the correct answer is 'Biome'.