Osmoregulation

The Osmoregulatory Abilities of Two Intertidal Worms, Nereis virens and Phascolopsis gouldii Authors Name: ___________________________________________________ biology Department, Hendrix College, Conway, AR 72032 Nereis virens, clam wriggles, atomic number 18 usual naval annelids, which are widespread in the intertidal regularize of many beaches in New Eng nation. They are particularly overabundant in the fastness intertidal zone (Fig. 1), where specimens may be pitch beneath rocks and in beds of mussels and algae. Phascolopsis gouldii, peanut worms, are other common worm native to the New England coast. They can ofttimes be found buried in silty or muddy areas in the lower parts of the intertidal zone (Fig. 1). Most naval worms are in osmotic residuum with the sea in which they live; i.e., their body fluids are round isoosmotic to sea pissing. However, the water of the intertidal zone is not always indistinguishable in salt to that of the open s ea. Both overflow of impertinently water from the land and rainfall may dilute water along the seashore. Alternatively, zoom pools may become saltier than the sea because of desiccation during exposure at low zoom. Both perturbations tend to summation in magnitude as height above the represent low tide line increases (Laboratory Manual for Principles of Biology, 1992). [pic] Figure 1.

The marine intertidal zone. The runoff of freshwater from the terrestrial environment lowers the saltiness in this zone turn evaporation raises it, resulting in a very variable salinity. ground on their positions within the intertidal zo! ne, I hypothesize that ________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ___________________________________________________ Therefore, if I place each of the worms in solutions of varying salinities, I would venture that ___...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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