Ferns Often Maintain High Diversity Even on Very Isolated Islands

question 11

Multiple Choice

Ferns often maintain high diversity even on very isolated islands. This is because

• A) ferns are often planted deliberately by human colonists.
• B) ferns are often introduced accidentally by human colonists.
• C) ferns are easily dispersed by light wind-blown spores.
• D) ferns are easily dispersed because birds carry their seeds.
• E) new fern species most often evolve on isolated islands.

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Definitions:

Excursion

The movement of a structure or part away from its resting position, often used in the context of muscle movement or joint mobility.

Extension

The movement by which the two ends of any jointed part are drawn away from each other, increasing the angle between them.

Adduction

The movement of a limb or other body part toward the midline of the body or toward another body part.

Flexion

The action of bending or the condition of being bent, especially of a joint or muscle.