The production of ________ by ________ is thought to be a major contributor to the biodeterioration of stone building materials

A) oxalic acid / fungi
B) sulfuric acid / sulfate reducers
C) nitric acid / nitrate reducers
D) carbonic acid / lichens


Answer: A

Biology & Microbiology

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Indicate whether the statement is true or false.

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One secondary spermatocyte ultimately produces ____ mature sperm

a. one b. two c. three d. four e. eight

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Access to ____ is usually the main limiting factor for growth of aquatic algae and cyanobacteria

a. iron b. hydrogen c. oxygen d. carbon e. phosphorus

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The movement of substances to regions of lower concentration is called?

What will be an ideal response?

Biology & Microbiology