carbon cycle: soil

What will be an ideal response?


carbon is held in the soil as organic matter which has not yet decomposed

Biology & Microbiology

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Viruses defy characterization as living organisms even though they possess nucleic acids and proteins. The reason why viruses are not considered to be alive is because they

A. form spontaneously. B. cannot form spontaneously. C. cannot reproduce without a host cell. D. lack genetic material.

Biology & Microbiology

The animal group with the highest biodiversity in the Great Barrier Reef is __________

a. birds b. coral c. fish d. mollusks

Biology & Microbiology

Each of the following is true regarding cancer cell metastasis to secondary sites except

A) cancer cells may multiply in regional lymph nodes if they enter via lymphatics. B) many cells from the primary mass may enter circulation. C) all cancer cells circulating in the bloodstream are identical. D) few cancer cells survive in the bloodstream. E) the population of cancer cells is heterogeneous.

Biology & Microbiology

In a 32-cell stage tunicate embryo, vegetal marginal cells that lack functional genes for both macho-1 and the FGF receptor would develop as what cell type?

A. Notochord B. Muscle C. Mesenchyme D. Nerve cord

Biology & Microbiology