The Flame-Like Vertical Forms and Breakaway Pieces of Mat in Ice-Covered

question 51

Multiple Choice

The flame-like vertical forms and breakaway pieces of mat in ice-covered Antarctic lakes are caused by

• A) limited light penetration in the lake.
• B) denitrification.
• C) sulfur-reducing bacteria.
• D) oxygen production.
• E) freeze-thaw cycles.

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