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Magazine Problem 1
Biogeographers study ___________. a. continental drift b. patterns in the world distribution of species c. mainland and island biodiversity d. both b and c are correct e. all are correct
Problem 2
Evolution __________. a. is natural selection b. is heritable change in a line of descent c. may occur by natural selection d.b and c are correct
Problem 3
__________ has/have influenced the fossil record. a. Sedimentation and compaction b. Tectonic plate movements c. Radioisotope decay d. All of the above
Problem 4
Evidence suggests that life originated in the __________. a. Archaean b. Proterozoic c. Phanerozoic d. Cambrian
Problem 5
Did Pangea or Gondwana form first?
Problem 6
Homologous structures among major groups of organisms may differ in __________. a. size b. shape c. function d. all of the above
Problem 7
Through __________ a body part of an ancestor became modified differently in different lines of descent. a. morphological convergence b. morphological divergence c. analogous structures d. homologous structures
Problem 8
By altering steps in the program by which embryos develop, ____________ may lead to major differences between adults of related lineages. a. automated gene sequencing b. homeotic gene mutations c. transposons d. b and c
Problem 9
Molecular clocks are based on comparisons of the number of ___________ mutations between species. a. gene b. neutral c. lethal d. conserved
Problem 10
In evolutionary trees, each branch point represents a(n) __________. a. single species b. extinction c. divergence d. adaptive radiation
