As a Consequence of Girdling a Tree

question 52

Multiple Choice

As a consequence of girdling a tree:

• A)its leaves stop exporting solutes.
• B)its leaves stop importing solutes.
• C)the bark above the girdle swells.
• D)the bark above the girdle dies.
• E)the bark begins to act as a source.

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Definitions:

Active Transport

Transport of a substance across a membrane that does not rely on the potential energy of a concentration gradient for the substance being transported and therefore requires an additional energy source (often ATP); includes carrier-mediated active transport, endocytosis, and exocytosis. Compare with diffusion and facilitated diffusion.

Pinocytosis

A cellular process by which cells engulf liquid particles through the formation of small vesicles.

Plasmodesmata

Cytoplasmic channels connecting adjacent plant cells and allowing for the movement of molecules and ions between cells.

Gap Junctions

Gap junctions are specialized intercellular connections between a multitude of animal cell-types, facilitating the direct transfer of ions and small molecules.