Using the sudden bloom of cyanobacteria in a lake due to anthropogenic fertilizer inputs as an example, explain the coupling of carbon, nitrogen, and oxygen cycling. Exclude discussion of all organisms other than microorganisms
What will be an ideal response?
Answer: An increase in primary producers results in more CO2 being taken (i.e., fixed) from the air. Increased biomass growth will also make more oxygen available for respiring heterotrophic microorganisms in the lake. The cyanobacteria might also increase nitrogen fixation, which would take nitrogen out of the atmosphere and bring in bioavailable nitrogen substrates for other microorganisms to proliferate.
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A climograph portrays the particular combination of temperature and rainfall conditions in each terrestrial biome
Indicate whether the statement is true or false.
The type of RNA that carries protein-building
information is called
a. ribosomal RNA. b. transfer RNA. c. messenger RNA. d. reader RNA. e. translator RNA
__________ are one of the few eukaryotic cells that can function without nuclei
a. Sieve tube elements b. Companion cells c. Tracheids d. Sclereids e. Vessel elements
Endosymbiotic theory explains how ____ evolved organelles
Fill in the blank(s) with the appropriate word(s).