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 saltwater 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. Marine; hypoosmotic
B. Freshwater; hypoosmotic
C. Freshwater; hyperosmotic
D. Marine; hyperosmotic
Answer: A
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Chemical reactions:
A. only break chemical bonds or form them but never in the same reaction. B. are written with the product on the left and the reactant on the right with an arrow to indicate the direction of the reaction. C. proceed spontaneously through a low-energy transition state to product. D. proceed spontaneously if the free energy of the product is greater than that of the reactant. E. require collisions between reactants, therefore the reaction rate increases when the concentration of the reactants is greater.
The taxonomic classification order, from least specific to most specific is:
a. domain, kingdom, phylum, class, family, order, genus, species. b. domain, kingdom, class, phylum, order, family, genus, species. c. domain, kingdom, order, class, phylum, family, genus, species. d. domain, kingdom, phylum, class, order, family, genus, species.
What is the correct order of structures in the electrical excitation pathway that generates a normal heartbeat?
Refer to the diagram below.
A. 1, 2, 3, 4, 5, 6
B. 3, 6, 2, 4, 1, 5
C. 6, 3, 2, 4, 5, 1
D. 1, 5, 4, 2, 3, 6
E. 2, 5, 1, 4, 6, 3
F. 3, 2, 6, 4, 5, 1
The component in the highest concentration in plasma is __________
a. water b. plasma proteins c. erythrocytes d. leukocytes e. salts