Molecular barcodes are
A. DNA sequences used to identify and catalog biodiversity.
B. barcodes stamped on vegetables in the supermarket to indicate freshness.
C. genetic inversions used to detect crossovers.
D. radioactively labeled genes used to detect horizontal transfer of genes.
Answer: A
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a. make up a monophyletic clade. b. are all asexual. c. are all internal parasites. d. are all bilaterally symmetrical. e. Only a) and d) are correct.
The product of the bicoid gene in Drosophila provides essential information about _____
A) lethal genes B) the dorsal-ventral axis C) the left-right axis D) segmentation E) the anterior-posterior axis
The sputum of a patient with acquired immunodeficiency syndrome (AIDS) is stained with Kinyoun's carbolfuchsin stain. Which organism would test positive using this stain?
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In studying the dance of the honeybees, Karl von Frisch determined the duration of dance conveyed the ____ of the
food and the angle of the dance conveyed the ____ of the food.
a. direction; distance b. distance; direction c. type; direction d. direction; type e. distance; type