The biosphere consists of many ________, each consisting of the organisms in a specific geographic area and their physical environment
Fill in the blank(s) with correct word
ecosystems
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Which of the following most directly gives rise to secondary xylem and phloem?
a. protoderm b. apical meristem c. ground meristem d. vascular cambium e. procambium
Yeasts are advantageous for studying secretory pathways because
a. they secrete more proteins per cell than animal cells. b. one can easily isolate Golgi apparatuses. c. they are amenable to genetic analysis. d. they have only one simple pathway for secreted proteins.
Which of the following statements about the indirect value of trees is not true?
A. They provide shade and reduce the need for fans and air conditioning. B. In forests, they exert a natural "sponge effect" for the provision of freshwater. C. They break down dead organic matter and other types of wastes. D. Globally, they stabilize the climate because they take up carbon dioxide. E. They retain soil and prevent soil erosion.
The formation of carbohydrates from carbon dioxide and water occurs in the portion of Figure 4-4 labeled:
a. A
b. B
c. C
d. D
e. E