Which group of fish has fleshy body extensions that support the bones in their pelvic and pectoral fins, enabling them to "walk" on the bottom of the ocean?
a. Hagfish
b. Lampreys
c. Cartilaginous fish
d. Bony fish
e. Ray-finned fish
e
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The hypothesis that proton motive force drives ATP synthesis is called the ________ hypothesis.
Fill in the blank(s) with the appropriate word(s).
Parasitism is a density-independent factor of population control
Indicate whether the statement is true or false.
In some situations, the death rate of a population declines before the birth rate begins to decline. What can be concluded about the population?
A) The carrying capacity is being reached. B) The population is in a demographic transition. C) A density-dependent factor is in action. D) The population occurs in an industrialized nation.
Chemical inhibitors of hormone synthesis or signaling are powerful tools that yield invaluable information about hormone function. Triadimefon, propiconazole, and spironolactone are just a few of the compounds identified to inhibit the function of brassinosteroids (BR). Which of the following are probable physiological effects due to the inhibition of BR? Check all that apply.
A. reduced xylem and phloem differentiation B. rapid aging C. increased stem length D. reduced mitotic activity