Final answer:
A biome is a broad, geographic area with specific biotic and abiotic characteristics, determined mainly by climate and distinguished by dominant plant life.
Step-by-step explanation:
A biome is a large-scale community on Earth that contains species with distinct biotic and abiotic features.
Terrestrial biomes, which are defined by the dominant plant life and climate, include regions such as tundras, temperate forests, grasslands, and deserts. Aquatic biomes encompass both freshwater and marine environments.
Biomes are shaped by key abiotic factors such as temperature, precipitation, and the variations in both, which together dictate the distribution and types of organisms that can survive in these environments.
With eight major terrestrial biomes recognized, the phenomena of net primary productivity and biogeography play significant roles in the health and distribution of these biotic communities.