Final answer:
The biome described with evergreen trees and heavy snowfall is the taiga or boreal forest, characterized by evergreen coniferous trees like pines and spruce that retain their needle-shaped leaves year-round.
Step-by-step explanation:
The biome that is full of evergreen trees, featuring needle-like leaves that stay green all year long, and experiences heavy snowfall in the winter is the taiga, also known as the boreal forest. This biome covers extensive areas of northern North America and Eurasia, is found roughly between 50 and 60° north latitude, and also in mountain ranges throughout the Northern Hemisphere. The taiga is characterized by long, cold winters and short, cool, wet summers, with annual precipitation mainly in the form of snow. The dominant vegetation in this biome consists of cold-tolerant, cone-bearing evergreen coniferous trees like pines, spruce, and fir, which retain their needle-shaped leaves throughout the year, allowing them to photosynthesize earlier in the spring and grow faster than deciduous trees in the same region due to these adaptations to the cold environment.