In both lichens and mycorrhizae, what does the fungal partner provide to its photosynthetic partner?

A) carbohydrates
B) fixed nitrogen
C) antibiotics
D) water and minerals
E) protection from harmful ultraviolet light


Answer: D

Biology & Microbiology

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Which of the following media will permit the growth of one group of bacteria while inhibiting the growth of some other groups?

A. Differential B. Characteristic C. Enrichment D. Selective

Biology & Microbiology

Fatty acids and ribozymes are incompatible as early molecules of life because ____

a. they have different pH requirements b. they most likely developed millions of years apart c. fatty acid vesicles are impermeable to ribozymes bound to ferrous oxide d. magnesium is required for ribozyme function but causes fatty acids to precipitate e. magnesium is required for fatty acids to form vesicles but causes ribozymes to precipitate

Biology & Microbiology

Explain how the movement of hydrogen and potassium ions across the membranes of guard cells

opens and closes the stomata. What will be an ideal response?

Biology & Microbiology

The smaller unit molecules (monomers) which combine to form proteins and polypeptides are called ____________.

a. amino acids b. fatty acids c. monosaccharides d. nucleotides

Biology & Microbiology