Multiple Choice
In which terrestrial biome would you find the most trees and plant growth?
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48. Ecology
Introduction to Terrestrial Biomes
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Which of the following is a possible reason for the lack of trees in the tundra biome?
A
Abundant nutrients in the soil favor only grass species.
B
Excessive rainfall leads to waterlogged soils unsuitable for trees.
C
High temperatures year-round inhibit tree seed germination.
D
The presence of permafrost prevents deep root growth.
Verified step by step guidance1
Understand the characteristics of the tundra biome: The tundra is a cold, treeless biome with low temperatures, short growing seasons, and a layer of permafrost (permanently frozen soil) beneath the surface.
Analyze the role of permafrost: Permafrost prevents deep root penetration because the soil remains frozen year-round, making it difficult for trees to establish a stable root system.
Evaluate the other options: Abundant nutrients in the soil do not favor only grass species; in fact, tundra soils are nutrient-poor. Excessive rainfall is not characteristic of the tundra, as it is a relatively dry biome. High temperatures year-round are also incorrect, as the tundra is defined by its cold climate.
Connect the correct answer to the biome's conditions: The presence of permafrost is a defining feature of the tundra and directly impacts the ability of trees to grow by limiting root depth and access to nutrients.
Conclude that the correct answer is: 'The presence of permafrost prevents deep root growth,' as this aligns with the environmental constraints of the tundra biome.
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