The large size of some Pleistocene mammals was probably an evolutionary adaptation to allow
these animals to live in tropical climates. Indicate whether the statement is true or false.
F
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The Cambrian sedimentary deposits of the Grand Canyon represent a regressive sequence. Indicate whether the statement is true or false
The glaze (or freezing rain) that sometimes forms in association with warm fronts occurs when:
A) snow melts against a warm surface and later freezes. B) rain strikes a very cold surface and freezes directly to it. C) rain freezes as it falls through the air. D) rain falls during the day and freezes at night.
One particular feature found in bony fishes but is absent in cartilaginous fishes is ________.
A. a swim bladder B. gills C. a pectoral fin D. a skeleton E. scales
Terrestrial radiation is ____
a. caused by the radioactive decay of elements in rocks b. ultraviolet energy from the Sun that reaches Earth's surface c. the cause of the "holes" in the ozone layer d. a stream of charged particles emitted by Earth, analogous to the solar wind e. thermal infrared energy emitted from Earth's surface