In your biology lab, you are given a vial that contains fish urine. Your assignment is to predict whether the urine came from a fresh- or salt-water species. You discover that the urine contains a high concentration of salts. What is your prediction for the fish's habitat? What is the concentration of solutes in the fish relative to its environment?
A. Freshwater, hypoosmotic
B. Freshwater, hyperosmotic
C. Marine, hypoosmotic
D. Marine, hyperosmotic
C. Marine, hypoosmotic
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Which of the following is true of plant cells?
A) Plant cells may contain chloroplasts. B) Plant cells are always much larger than animal cells. C) Chromosomes are found only in plant cells. D) Only plant cells have a cell membrane. E) The plant cell has no cell wall.
Which type of change in chromosome structure characterizes cri du chat syndrome?
A. duplication B. inversion C. trisomy D. translocation E. deletion
The transparent anterior portion of the eye is the ____
a. cornea b. sclera c. iris d. ciliary body e. fovea
Which component of the 50S subunit is believed to be responsible for catalysis?
What will be an ideal response?