. What skeletal features differentiate modern humans from apes, and what common purpose do all these differences
serve? What will be an ideal response?
ANSWER: Compared to apes, humans have a spine that enters the skull inferiorly, an S-shaped spine,
legs longer than arms, and arched feet with non-opposable toes. All these skeletal features
allow us to be more efficiently bipedal.
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Which of the following statements about plant macronutrients is/are true? Check all that apply.
_____ They approach or exceed 1% of a healthy plant's dry weight. _____ They reduce the need for CO2 during photosynthesis. _____ A deficiency in any one can have severe effects on a plant's growth. _____ They can have important implications for human nutrition. _____ The ability of the plants to take up minerals is affected by soil pH.
Cotransformation between two genes is more likely if they are:
A. not located on the same chromosome. B. close to one another. C. both oriented in the same direction. D. far apart from one another. E. both next to the F factor.
Which of the following statements about cyclin B is false?
a. It is a component of MPF. b. It accumulates throughout S and G2. c. It activates Cdc2 protein kinase. d. It cycles between active and inactive states in the cell cycle.
The best description of the two components of blood is
A. white blood cells and red blood cells. B. formed elements and plasma. C. formed elements and platelets. D. red blood cells and plasma. E. platelets and plasma.