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
Answer: D
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Which of the following is the skeletal muscle type associated with stamina and endurance?
A. smooth muscle B. fast twitch fibers C. slow twitch fibers D. isometric motor units
Some cyanobacteria are not blue-green, rather they are red or brown; this is due to the presence of the photosynthetic pigment ________.
Fill in the blank(s) with the appropriate word(s).
Muscle contraction occurs in a cyclic process. Which of the following sequences is in the correct order?
A) power stroke, cross bridge formation, cross bridge dissociation, cocking of myosin B) cross bridge formation, power stroke, cross bridge dissociation, cocking of myosin C) cross bridge formation, cocking of myosin, power stroke, cross bridge dissociation D) cross bridge formation, cross bridge dissociation, cocking of myosin, power stroke E) cross bridge formation, power stroke, cross bridge dissociation, power stroke, cocking of myosin
Both cnidarians and ctenophores manufacture their own nematocysts for capturing prey
Indicate whether the statement is true or false