Figure 23.12
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The structures labeled "5" in the figure are ____.
A. zygospores
B. haploid spores
C. ascospores
D. gametes
E. zygotes
Answer: B
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A genetic mutation results in the inability for a cycad to produce coralloid roots. What types of soils would be least conducive to the survival of this cycad relative to members of the species not affected by this mutation?
A. Soils saturated with water. B. Drier soils. C. Soils with lower mean temperatures. D. Soils with lower nitrogen. E. Soils with lower pH.
DNA has a double helix structure. Refer to the figure below. What two components make the outside rails (called the backbone) of the double helix?
a. nitrogenous bases and carbon
b. hydrogen and ribose
c. sugar and phosphate
d. enzymes and sugar
The light and dark reactions of photosynthesis occur in different areas of the chloroplast
Indicate whether the statement is true or false
A cell is in metaphase if:
a. the chromosomes are visible as threadlike structures. b. the nuclear envelope is clearly visible. c. the chromosomes are aligned at the midplane of the cell. d. the chromosome are separated into distinct groups at opposite poles of the cell. e. cytokinesis is occurring.