Multiple Choice
Which of the following functional groups is commonly found in compounds secreted onto the surface of the skin?
2. Molecular Representations
Functional Groups
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What important role does lignin play in the structure of vascular plants?
A
Lignin provides structural support and rigidity to plant cell walls.
B
Lignin acts as a primary energy source for plant growth.
C
Lignin is responsible for photosynthesis in plant leaves.
D
Lignin facilitates the transport of nutrients in the phloem.
Verified step by step guidance1
Understand the structure of vascular plants: Vascular plants have specialized tissues (xylem and phloem) for transporting water, nutrients, and food throughout the plant.
Identify the role of lignin: Lignin is a complex organic polymer found in the cell walls of many plants, particularly in wood and bark.
Recognize the function of lignin in plant cell walls: Lignin provides structural support and rigidity, allowing plants to grow upright and withstand various environmental stresses.
Differentiate lignin's role from other plant functions: Lignin is not involved in photosynthesis or nutrient transport, which are functions of chlorophyll and phloem, respectively.
Conclude the primary role of lignin: Lignin's main function is to provide structural support and rigidity to plant cell walls, crucial for the plant's overall stability and growth.
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