The horizontal stems of seagrasses are called:
a. rhizoids.
b. rhizomes.
c. stipes.
d. blades.
e. holdfasts.
B
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The basic unit of heredity is the ___________
A. individual B. gene C. macromolecule D. trait E. None of the answers are correct
Where is most the Earth’s phosphate found?
a. ocean water b. aquifers c. the atmosphere d. rocks and sediments e. plants
An amphipathic molecule has:a
two polar ends. b. two hydrophobic ends. c. a hydrophobic and a hydrophilic portion. d. only one hydrophobic end. e. only one hydrophilic end
Which of the following clusters of terms accurately describes DNA as it is generally viewed to exist in prokaryotes and eukaryotes?
A) double-stranded, antiparallel, (A + T)/C + G) = variable, (A + G)/(C + T) = variable B) double-stranded, parallel, (A + T)/C + G) = 1.0, (A + G)/(C + T) = 1.0 C) single-stranded, antiparallel, (A + T)/C + G) = 1.0, (A + G)/(C + T) = 1.0 D) double-stranded, parallel, (A + T)/C + G) = variable, (A + G)/(C + T) = 1.0 E) double-stranded, antiparallel, (A + T)/C + G) = variable, (A + G)/(C+ T) = 1.0