What is the ecological importance of salps and larvaceans to the pelagic food web?
What will be an ideal response?
Salps and larvaceans filter feed by processing massive quantities of seawater through fine filtration devises. This activity has the effect of concentrating these scarcely abundant phytoplankton within these grazers, which, in turn, are consumed by larger predators. In addition, because the filtration mechanism of salps and larvaceans is so fine, it captures even the smallest nanoplankton, thereby injecting these small producers into the food web.
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The geological evidence that was incorporated by Darwin, which showed that the earth was much older than previously thought, was compiled by
a. Charles Lyell. b. Alfred Wallace. c. Thomas Malthus. d. Alfred Wegener. e. Steven Jay Gould.
Aquatic organisms are unable to tolerate low pH conditions mainly because acidic waters contain high concentrations of toxic
A) sodium. B) chlorine. C) aluminum. D) carbon dioxide.
The type of bone tissue that is found in the middle portion of a long bone and has lacunae arranged in concentric circles around central canals that contain blood vessels and nerves is
A. yellow marrow. B. red marrow. C. spongy bone. D. compact bone. E. fibrous membrane.
What human organ is formed from two genetically different tissues?
A. Uterus B. Neural crest C. Neural tube D. Placenta