1. Which of the following statements about evolution and ecologyis TRUE?

Evolutionary processes and ecological processes can occur onsimilar time scales.

Evolution by natural selection is generally not mediated byecological phenomena (such as predation).

The evolution of a population will not affect how its membersinteract with individuals of other species.

Rapid evolution is possible only when a population's chemicalenvironment changes quickly.

2. After common ragweed reached Japan a century ago and escapedtheir leaf beetle enemies, populations of the plants evolvedreduced investment in defense and greater investment in growth.During the last 20 years or so, ragweed leaf beetles have appearedin some parts of mainland Japan. Which of the following scenariosis most likely now happening as a result?

Japanese ragweed is evolving back toward greater investment indefense and reduced investment in growth, as a result of selectionby herbivory from beetles.

Japanese ragweed is not evolving a new investment strategy,because it takes more than a couple of decades for a population toevolve.

Japanese ragweed is not evolving a new investment strategy,because the beetles no longer eat the plants.

Japanese ragweed is evolving greater investment in defense andgreater investment in growth because both defense and growth arebeneficial.

3. Which of the following mechanisms of evolution can act on asingle population at the same time?

Only natural selection and genetic drift can happen at the sametime.

Genetic drift, migration, and mutation can happen at the sametime, but not with natural selection.

Natural selection, genetic drift, migration, and mutation canall happen at the same time.

None of the above. Only one mechanism can act on a population ata time.