________ would produce the smallest evolutionary change in a given period of time in a population of birds.
A. Natural selection
B. Gene flow
C. Mutation
D. Migration
E. Assortive mating
Answer: C
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Systematists aided in the effort to eradicate malaria from Europe by ____
a. developing insecticides to kill mosquitoes b. categorizing mosquitoes into six species c. discovering that all mosquitoes breed in standing water d. cloning the genes of the malaria pathogen e. identifying Plasmodium as the parasite that causes malaria
Transgenic ________ have been given suicide genes that cause them to self-destruct when the job for which they are engineered has been accomplished.
A. plants B. animals C. fungi D. bacteria E. All of the choices are correct.
The evolution of ________ marks the beginning of the hominids.
Fill in the blank(s) with the appropriate word(s).
On a trip to the Southwest United States, you and a friend collect some seeds from a piñon, a type of pine tree. Your friend also gathers a small bagful of soil from under the piñon tree. Back home, both of you plant your seeds in commercial sterilized
potting soil, but your friend adds a spoonful of the collected dirt to each of her pots. Her seedlings do better than yours. What is the likeliest explanation for your differences? A) Pine seedlings are better adapted to the sandy soil of the Southwest than to commercial potting mix. B) The soil from the Southwest probably contained macronutrients missing from the potting mix. C) The soil from the Southwest probably contained nitrogen-fixing bacteria that colonized the seedlings' root nodules. D) The soil from the Southwest probably contained fungi able to establish a mycorrhizal association with the seedlings' roots.