What body cavity does the heart reside within?
a. cranial
b. spinal
c. thoracic
d. abdominal
e. pelvic
c
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Which is true about the energy of activation?
A. In any one metabolic pathway, all steps will have the same energy of activation. B. Adding the correct enzyme can lower the energy of activation. C. Energy of activation is the difference between the energy of the reactant and the energy of the product. D. Energy of activation is measured as the energy that is released after a reaction occurs. E. The energy of activation is always lower than the energy of the reactant.
The "power stroke" of the myosin head that slides actin past myosin most directly involves _______.
A. binding of ATP B. binding of ADP C. release of Pi D. hydrolysis of ATP
The Law of Thermodynamics that states that increases in entropy are favored is:
A. The Fourth Law of Thermodynamics B. The Third Law of Thermodynamics C. The Second Law of Thermodynamics D. The First Law of Thermodynamics
Stomata are:a
waxy layers that cover leaves. b. openings in the leaf epidermis. c. extensions of bundle sheaths. d. particularly numerous on the upper epidermis. e. guarded by two stipule cells.