How are eukaryotic chromosomes replicated?
a. The linear DNA molecules are replicated from multiple origins of replication bidirectionally.
b. The linear DNA molecules are replicated from one origin of replication bidirectionally.
c. The circular DNA molecules are replicated from multiple origins of replication bidirectionally.
d. The circular DNA molecules are replicated from one origin of replication bidirectionally.
e. The linear DNA molecules are replicated from one origin of replication unidirectionally.
a
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Which of the following occurs during systole?
A. Both ventricles contract. B. Both atria contract. C. The left ventricle contracts. D. The ventricles fill with blood. E. The atria fill with blood.
Femaleness or maleness is genetically set at
A) gamete formation. B) fertilization. C) the embryonic period. D) the fetal period.
The movement of organic compounds in phloem is
described as a. sink-to-source. b. pressure flow. c. cohesion-tension. d. active transport. e. transpiration pull.
The Glomeromycota are called AM fungi because
A. they shed their spores only in the morning. B. they grow only on the chaff of ant middens. C. they produce fruiting bodies at night that only last through the following morning. D. they decompose animal manure. E. they produce arbuscular mycorrhizae in the cells of plant roots.