One would expect the concentration of sugar in __________ to be greater than in
__________.
a. leaves; roots
b. root; leaves
c. flowers; leaves
d. The concentration of sugar would be the same in all parts of the plant.
A
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Refer to the figure above. Which curve best describes survivorship in humans who live in developed nations?
A) A B) B C) C D) D E) E
Hummingbirds are attracted to red flowers with long tubes. What might you predict would happen to flowers if hummingbirds become the predominant species on a remote island?
A) Flowers would become gradually more red. B) Flowers would develop shorter tubes. C) Hummingbirds would develop longer beaks. D) Hummingbirds would become extinct.
How does the organization of the bacterial genome differ from the organization of the eukaryotic genome?
A. Most bacterial chromosomes are circular and the eukaryotic chromosomes contained in the nucleus are not. B. Eukaryotic chromosomes have to be tightly packed to fit into the nucleus, and bacterial chromosomes do not require tight packing to fit into the cell. C. Bacterial chromosomes are made up of RNA and eukaryotic chromosomes are made up of DNA. D. The eukaryotic genome is found on chromosomes and there are no chromosomes in bacterial cells. E. The compaction of the eukaryotic genome involves structural maintenance of chromosome (SMC) proteins, and the compaction of the bacterial genome does not.
Genes organized into an operon are beneficial to certain bacteria because the operon allows for
A. coordinated regulation of a group of proteins involved in numerous cellular activities. B. coordinated regulation of a group of genes that encode proteins with different functions. C. coordinated regulation of a group of genes that encode proteins with a common function. D. separate regulation of individual genes that encode proteins with different functions. E. differential regulation of individual genes that encode proteins with a common function.