Sharks and rays tend to be larger than bony fish
a. True
b. False
True
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Wegener used all the following to provide evidence for continental drift except :
a) age of selected continental rocks. b) shape of continental margins. c) location of coral reef fossils. d) apparent polar wandering. e) seafloor magnetic pattern.
The recession of the early 21st century resulted in
A) slowed interregional migration because there were few opportunities anywhere. B) slowed intraregional migration because housing prices were high. C) increased interregional migration because of job searches. D) increased intraregional migration because of job searches. E) intraregional migration matched perfectly with interregional migration.
A second green revolution has been taking place since 1967, based on ____.
A. fast-growing cattle B. extra heavy hogs C. sheep that fatten quickly D. fast-growing rice and wheat E. vitamin enriched soybeans
What evidence first indicated to scientists that the continents were once connected?
a. the apparent jigsaw-like fit of continents together, as in the case of South America and Africa b. the distribution of coal from tropical swamps of the past among North America, Europe, northern Africa, and Asia c. deformed igneous rocks in Brazil that highly resembled similar rocks in Africa d. the presence of Glossopterison fossils on five different continents e. the evidence of past isthmian links which allowed land animals to reach other landmasses across the ocean