Chapter 16

The number of species on an island depends on the size of the island and its distance from a mainland. This statement would most likely be made by ______. a. an explorer b. a biogeographer c. a geologist d. a philosopher

Evolution ______. a. is natural selection b. is heritable change in a line of descent c. can occur by natural selection d. b and c are correct

Which of the following is a fossil? a. An insect encased in 10 -million-year-old tree sap b. A woolly mammoth frozen in Arctic permafrost for the last 50,000 years c. Mineral-hardened remains of a whale-like animal found in an Egyptian desert d. An impression of a plant leaf in a rock e. All of the above could be considered fossils

Did Pangea or Gondwana form first?

The bones of a bird's wing are similar to the bones in a bat's wing. This observation is an example of ________. a. uniformity b. evolution c. comparative morphology d. a lineage

If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is ________years old. a. 15,000 b. 26,667 c. 30,000 d. 40,000

Forces of geologic change include ________ (select all that are correct). a. erosion b. fossilization c. volcanic activity d. evolution e. tectonic plate movement f. wind g. asteroid impacts h. hot spots

Through ________, a body part of an ancestor is modified differently in different lines of descent. a. morphological divergence b. adaptive divergence c. morphological convergence d. homologous evolution

Homologous structures among major groups of organisms may differ in ________. a. size b. shape c. function d. all of the above

Match the terms with the most suitable description. ________fitness ________fossils ________homeotic genes ________half-life ________homologous structures ________uniformity ________analogous structures ________natural selection a. evidence of life in distant past b. geologic change occurs continuously c. human arm and bird wing d.big role in development e. measured by reproductive success f. insect wing and bird wing g. survival of the fittest h.characteristic of radioisotope