During the last decade, the U.S. Fish and Wildlife Service has worked to reestablish the critically endangered California condor in its last stronghold, the mountains of southern California
Recently, the service has also tried to establish a second population in the Grand Canyon region of Arizona. Why would the Fish and Wildlife Service consider it a high priority to establish two populations that are geographically distant from each other? A) Multiple condor populations reduce inbreeding.
B) Multiple condor populations provide more opportunities for people to view the endangered species, which may cause more people to be concerned with its fate.
C) Multiple condor populations reduce genetic drift within each population.
D) Multiple condor populations reduce the risk of extinction due to localized catastrophes.
D
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Which of the following pairs indicates the closest
macroevolutionary link among the bacteria according to the evolutionary history tree in the text? a. green sulfur; spirochetes b. chlamydias; cyanobacteria c. green sulfur; green nonsulfur d. spirochetes; proteobacteria e. proteobacteria; cyanobacteria
What are hyphae?
A) symbiotic associations between plant roots and fungi B) threadlike filaments that make up fungal bodies C) fungal digestive enzymes D) fungal spores
Which of the following features are found within the lophotrochozoa?
A. Bilateral symmetry at some point in their life, three germ layers as embryos, are terrestrial, and are classified as protostomes. B. Radial symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as protostomes. C. Bilateral symmetry at some point in their life, two germ layers as embryos, are aquatic, and are classified as protostomes. D. Bilateral symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as deuterostomes. E. Bilateral symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as protostomes.
Which of the following tissues covers the body surfaces, lines the body cavities and organs, and forms glands?
A) epithelial B) connective C) nervous D) muscle