What error of meiosis leads to both a duplication and a deletion?

A) unequal crossing over
B) X-ray chromosomal breakage
C) replication cross formation
D) replication errors
E) D loop formation


Answer: A

Biology & Microbiology

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Which one of the following lists the bones of the arm from the fingertips to the shoulder joint?

A) humerus, radius and ulna, carpals, metacarpals, phalanges B) phalanges, metacarpals, carpals, radius and ulna, humerus C) phalanges, carpals, metacarpals, radius and ulna, humerus D) phalanges, metacarpals, carpals, humerus, radius and ulna E) radius and ulna, humerus, carpals, metacarpals, phalanges

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Which lineage of Cnidarians exist primarily as cube-shaped medusae, are active swimmers, and produce one of the deadliest toxins made by animals?

a. Hydrozoa b. Trematoda c. Cubozoa d. Anthozoa

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Which of the following are among the activities of neutrophils?

A) formation of neutrophil extracellular traps B) release of histamines C) enzyme production that leads to the formation of nitric oxide D) formation of neutrophil extracellular traps and release of histamines E) formation of neutrophil extracellular traps and production of nitric oxide

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Which of the following are the main decomposers of the Earth?

A. bacteria and viruses B. algae and viruses C. protists and fungi D. bacteria and fungi E. All organisms are decomposers.

Biology & Microbiology