Which type of vascular tissue conducts carbohydrates?
A. sclereids
B. collenchyma cells
C. xylem
D. phloem
E. fibers
Answer: D
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The production of large quantities of a particular DNA sequence is known as gene ________.
Fill in the blank(s) with the appropriate word(s).
Recall the classic experiments assessing arthropod extinction rates in moss (Figure 46.14). If corridors are eliminated between moss patches, how does this change affect the arthropods inhabiting the moss?
A. Arthropod extinction rates remain the same. B. Arthropod extinction rates decrease. C. Arthropod extinction rates increase.
Even though plant cell walls in the root system are rigid they are permeable to ________. a. water and sunlight b. sunlight and potassium c. They are not permeable to anything
d. water and ions e. sunlight and oxygen
The pollen grain is indicated by
a. A. b. B. c. C. d. D. e. E.