Osmoregulation

The Osmoregulatory Abilities of Two Intertidal Worms, Nereis virens and Phascolopsis gouldii Authors Name: ___________________________________________________ biota Department, Hendrix College, Conway, AR 72032 Nereis virens, clam wriggles, atomic number 18 rough-cut naval annelids, which are widespread in the intertidal geographical district of many beaches in New Eng nation. They are particularly rife 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 lots be found buried in silty or muddy areas in the lower parts of the intertidal zone (Fig. 1). Most oceanic worms are in osmotic labyrinthine sense with the sea in which they live; i.e., their body fluids are virtually isoosmotic to sea body of water. However, the water of the intertidal zone is not always analogous in salt to tha t of the open sea. Both overflow of neat water from the land and rainfall may dilute water along the seashore. Alternatively, zoom pools may become saltier than the sea because of vapor during exposure at low zoom. Both perturbations tend to cast up in magnitude as height above the reckon 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 coarseness in this zone turn evaporation raises it, resulting in a very variable salinity. g round on their positions within the intertid! al zone, 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: BestEssayCheap.com

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