What term describes an anomaly that is similar to the reappearance of an ancestral trait?
A)vestigialism
B)analogism
C)atavism
D)homologism
E)phylogeny
C
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What percentage of parent isotope is remaining if 1 half life has elapsed?
- 6.25%
- 12.5%
- 25%
- 50%
- 100%
If an earthquake occurred near the oceanic trench in this figure, which one of the following hazards is likely to threaten the town of White Sands?
A) Landslides and other slope failures caused by shaking
B) Destruction by a tsunami
C) Volcanic material erupted from lava mountain
D) All of these threaten the town of White Sands.
What makes it possible for the coexistence of several warbler species that feed on the same insect larvae?
A) Some of the warblers are diurnal and some nocturnal. B) The birds eat in the same portion of different evergreens. C) The birds eat in the different portions of the forest canopy. D) The warblers do not experience intraspecies competition. E) The birds eat in the same area of different fir and spruce trees.
Which of the following human activities may make soils more prone to erosion?
A) overcultivation B) overgrazing C) forest clearance D) overcultivation, overgrazing,and forest clearance may all make soils more prone to erosion