Hyperosmotic body fluids
What will be an ideal response?
higher salt than surrounding water. Freshwater fish.
Drink little water, takes up ions thru gills, absorbs water thru skin, excretes dilute urine.
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Which structure is exclusively reptilian?
a. A b. B c. C d. D e. none of these
Which macromolecule has a sugar-phosphate backbone?
A) lipid B) nucleic acid C) protein D) polysaccharide
Which of the following structures are responsible for the shape of a cell?
a. cell junctions b. microvilli c. cytoskeleton d. organelles
The signal recognition particle (SRP) functions in
A. binding to a newly translated protein and escorting it to the cell membrane, the cytoplasm, or the Golgi. B. binding to a signal rRNA molecule and allowing it to exit the nucleus and associate with ribosomal proteins. C. marking an organelle for destruction by lysosomes. D. recognizing an ER signal sequence and binding to an SRP receptor in the ER. E. determining the destination of a vesicle that buds from the Golgi.