The evolution of conducting tubes (sieve tubes) in land plants and brown algae is an example of
A. homoplasy caused by convergence.
B. homoplasy caused by common descent.
C. homoplasy caused by evolutionary reversal.
D. homology caused by convergence.
E. homology caused by common descent.
A. homoplasy caused by convergence.
You might also like to view...
Which of the following is the fourth basic step to genetically modify a cell?
A) transformation B) ligation C) plasmid cleavage D) isolation of gene E) restriction-enzyme digestion of gene
Evolution of embryonic pathways probably occurs most commonly through ____
a. macroevolutionary mechanisms b. microevolutionary mechanisms c. protein recruitment d. extinction e. mutations during embryonic development
Which line of evidence supports the protein-first hypothesis?
a. Amino acids existed on prebiotic Earth and in meteorites. b. Proteins display more chemical diversity than nucleic acids. c. Proteins display more structural diversity than nucleic acids. d. Protein function can be reproduced in a population. e. Nucleic acids are too simple to have been the first "polymers of life."
When the Darwin/Wallace theory of natural selection is summarized, four central postulates emerge. Which of the following is NOT one of these four natural selection postulates?
A) Variations exist in any given generation of a species. B) Variations in traits are produced by mutations. C) Variations are, at least in part, heritable. D) Those individuals whose variations confer an advantage are more likely to survive and reproduce.