How many elements occur naturally?
A. 64
B. 92
C. 6
D. 32
E. 112
Answer: B
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The light-independent reactions of plants function to make organic molecules using carbon dioxide as a carbon source. What is the electron source that helps reduce carbon dioxide to sugars and other organic molecules?
A) NADH B) NADPH C) ATP D) electrons from oxygen
The complex polysaccharide that provides flexibility to the primary walls of collenchyma cells is called ____
a. cellulose b. lignin c. fiber d. pectin e. cuticle
What is the structure labeled as A in the accompanying figure?
a. germinating spore b. gametangium of a plant c. gametangium of an alga d. megasporangium of an alga e. megasporangium of a plant
Which of the following is NOT among the characteristics associated with Type-A personality?
A. Time urgency B. Patience C. Competition D. Hostility