Final answer:
The tropical rainforest biome lacks a dry season, in contrast to other forest biomes that have a distinct fall and winter with leaf loss and dormant periods for trees. This biome has stable temperatures and year-round rainfall, which supports continuous plant growth and evergreen vegetation throughout the year.
Step-by-step explanation:
What Season is Absent in the Tropical Rainforest?
The tropical rainforest, also known as the tropical wet forest, is a biome characterized by high net primary productivity and a consistent, year-round climate with ample rainfall. It is found in equatorial regions where the temperatures are stable, ranging between 20°C to 34°C (68°F to 93°F). Unlike temperate forests that have deciduous trees losing their leaves in a defined fall season, the trees in a tropical rainforest are mostly evergreen and do not undergo a seasonal loss of leaves due to variations in temperature and sunlight. As a result, tropical rainforests do not have a dry season similar to that of tropical dry forests; they enjoy a consistent level of precipitation throughout the year, and plants grow continuously. This contrasts with deciduous and temperate biomes, where plant growth is seasonal and occurs primarily in spring and summer.
The tropical rainforest experiences wet months with over 30 cm (11-12 in) of rainfall as well as relatively dry months where rainfall might be less than 10 cm (3.5 in), but even its driest month usually has more rainfall than the annual totals of some drier biomes. This ample and consistent precipitation, combined with the stable temperatures, supports the rainforest's evergreen characteristic and absence of a seasonal growth pattern seen in other biomes.