The fact that modern Native Americans share certain genetic markers with indigenous populations in southern Siberia, but not with others, is evidence that
A) the ancestors of modern Native Americans migrated from Siberia to the Americas.
B) the ancestors of Native Americans migrated from Europe to the U.S. east coast.
C) the ancestors of modern Siberians migrated from the west coast of the U.S. to Russia.
D) Mitochondrial Eve lived in Siberia and her descendants migrated to the U.S.
A) the ancestors of modern Native Americans migrated from Siberia to the Americas.
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Very high solar energy input; temperature and moisture not limiting; high biomass, high total productivity; many species.
A. desert B. savanna C. taiga D. temperate grassland E. tropical rain forest
Match each root adaptive type with the plant in which it is found.
1. Buttress roots 2. Prop roots 3. Pneumatophores a. Corn b. Tropical trees c. Mangrove trees
Agricultural workers and field archaeologists are exposed to this organism which, despite entering via the respiratory tract, can cause meningitis.
A. Neisseria meningitidis B. Cryptococcus neoformans C. Coccidioides immitis D. Haemophilus influenzae E. Streptococcus pneumoniae
Birds belong to a related group of vertebrates that includes all of the
A) ray-finned fishes. B) amphibians. C) lobe-finned fishes. D) reptiles. E) mammals.