Introduction to Environmental Sciences Self Quiz Unit 3

Question 2 Question text Which of the following situations will lead to natural selection?Select one: a. The seeds of two plants land near each other and one grows larger than the other. b. Two types of fish eat the same kind of food, and one is better able to gather food than the other. c. Male lions compete for the right to mate with females, with only one possible winner. d. all of the above Feedback The correct answer is: all of the above Question 3 Incorrect Mark 0.00 out of 1.00 Flag question Question text What is the difference between micro- and macroevolution? Select one: a. Microevolution describes the evolution of small organisms, such as insects, while macroevolution describes the evolution of large organisms, like people and elephants. b. Microevolution describes the evolution of microscopic entities, such as molecules and proteins, while macroevolution describes the evolution of whole organisms. c. Microevolution describes the evolution of populations, while macroevolution describes the emergence of new species over long periods of time. d. Microevolution describes the evolution of organisms over their lifetimes, while macroevolution describes the evolution of organisms over multiple generations. Feedback The correct answer is: Microevolution describes the evolution of populations, while macroevolution describes the emergence of new species over long periods of time. Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text Galápagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are separated by about 100 km of ocean. Occasionally, individuals from either island fly to the other island to stay. This can alter the allele frequencies of the population through which of the following mechanisms? Select one: a. natural selection b. genetic drift c. gene flow d. mutation Feedback The correct answer is: gene flow Question 5 Incorrect Mark 0.00 out of 1.00 Flag question Question text In which of the following pairs do both evolutionary processes introduce new genetic variation into a population? Select one: a. natural selection and genetic drift b. mutation and gene flow c. natural selection and gene flow d. gene flow and genetic drift Feedback The correct answer is: mutation and gene flow Question 6 Incorrect Mark 0.00 out of 1.00 Flag question Question text Which situation would most likely lead to allopatric speciation? Select one: a. A flood causes the formation of a new lake. b. A storm causes several large trees to fall down. c. A mutation causes a new trait to develop. d. An injury causes an organism to seek out a new food source. Feedback The correct answer is: A flood causes the formation of a new lake. Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text The word “theory” in theory of evolution is best replaced by __________. Select one: a. fact b. hypothesis c. idea d. alternate explanation Feedback The correct answer is: fact Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text The number of currently described species on the planet is about __________. Select one: a. 17,000 b. 150,000 c. 1.5 million d. 10 million Feedback The correct answer is: 1.5 million Question 9 Incorrect Mark 0.00 out of 1.00 Flag question Question text A secondary plant compound might be used for which of the following? Select one: a. a new crop variety b. a new drug c. a soil nutrient d. a crop pest Feedback The correct answer is: a new drug Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text Pollination is an example of __________. Select one: a. a possible source of new drugs b. chemical diversity c. an ecosystem service d. crop pest control Feedback The correct answer is: an ecosystem service Question 11 Correct Mark 1.00 out of 1.00 Flag question Question text Converting a prairie to a farm field is an example of __________. Select one: a. overharvesting b. habitat loss c. exotic species d. climate change Feedback The correct answer is: habitat loss Question 12 Correct Mark 1.00 out of 1.00 Flag question Question text Which two extinction risks may be a direct result of the pet trade? Select one: a. climate change and exotic species introduction b. habitat loss and overharvesting c. overharvesting and exotic species introduction d. habitat loss and climate change Feedback The correct answer is: overharvesting and exotic species introduction Question 13 Correct Mark 1.00 out of 1.00 Flag question Question text What kind of ecosystem are exotic species especially threatening to? Select one: a. deserts b. marine ecosystems c. islands d. tropical forests Feedback The correct answer is: islands Question 14 Correct Mark 1.00 out of 1.00 Flag question Question text Certain species of parrot cannot be brought to the United States to be sold as pets. What is the name of the legislation that makes this illegal? Select one: a. Red List b. Migratory Bird Act c. CITES d. Endangered Species Act (ESA) Feedback The correct answer is: CITES