Multiple Choice
In an ecological food chain, how are primary consumers different from secondary consumers?
755
views
48. Ecology
Introduction to Ecology
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the context of primary succession, what role do lichens play?
A
They break down rock surfaces to form soil.
B
They increase the acidity of the soil.
C
They provide shade for other plants.
D
They consume organic matter from the soil.
Verified step by step guidance1
Understand the concept of primary succession: Primary succession occurs in lifeless areas where there is no soil, such as on bare rock surfaces after a volcanic eruption or glacier retreat.
Identify the role of pioneer species: In primary succession, pioneer species are the first organisms to colonize the barren environment. Lichens are a common example of pioneer species.
Examine how lichens contribute to soil formation: Lichens secrete acids that chemically weather the rock surface, breaking it down into smaller particles. This process contributes to the formation of soil.
Consider the impact of lichens on the environment: As lichens break down rocks, they create a more hospitable environment for other organisms by increasing the availability of nutrients and organic matter.
Evaluate the options given in the problem: Based on the role of lichens in primary succession, determine which option correctly describes their function in breaking down rock surfaces to form soil.
Related Videos
Related Practice
Introduction to Ecology practice set
Problem sets built by lead tutorsExpert video explanations