The most significant cause of global warming is:
A. a tilt in the earth's orientation to the sun
B. greenhouse gases
C. the thinning of the ozone layer
D. acid rain
C. the thinning of the ozone layer
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Which of the following statements is true?
A. There is universal agreement on the number of species represented by all hominin fossils. B. A clear chronological framework has been devised for fossil hominins. C. Each fossil hominin, as it is discovered, is automatically designated as a new and separate species. D. "Lumpers" and "splitters" disagree on the taxonomic status of hominin fossils.
Which of the following species walked upright?
A. Orrorin tugenensis B. Sahelanthropus tchadensis C. Kenyapithecus platyops D. Ardipithecus ramidus E. All of the answers are correct.
Global warming will cause a rise in diseases mostly in the more temperate areas of the globe
a. True b. False
Which two kinds of dating methods do scientists use?
a. Paleoecology ad Taphonomy b. Artifacts and Context c. Relative and Chronometric d. Fluorine Analysis and Stratigraphy e. Absolute and Estimated.