According to this species-area curve for reptiles and amphibians on a West Indian archipelago, how will the number of species living in the area change if the original area was decreased by 50%?
A) +50%
B) -50%
C) -90%
D) -10%
D
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Diagrams of gene order and spacing on chromosomes are
A. phenotypes. B. genotypes. C. linkage maps. D. karyotypes. E. metabolic maps.
A recent study of ecological footprints (described in the text) concluded that
A) Earth?s carrying capacity for humans is about 10 billion. B) Earth?s carrying capacity would increase if per capita meat consumption increased. C) current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries. D) the ecological footprint of the United States is large because per capita resource use is high. E) it is not possible for technological improvements to increase Earth?s carrying capacity for humans.
The various lines of evidence for evolution together support the core principles of evolution because:
A) they are internally consistent even though they don't agree with each other. B) they are internally consistent and agree with each other. C) scientists ignore the inconsistencies and choose the best lines of evidence to support their opinions. D) they only occasionally are falsified.
Intermediate filaments are
A) different in different cell types. B) smaller than actin filaments. C) composed of tubulin. D) composed of globular proteins only. E) none of the above