#Question id: 4651
#Section 2: Evolution
Some members of a photosynthetic plant species are genetically resistant to an herbicide, while other members of the same species are not resistant to the herbicide. Which combination of events should cause the most effective replacement of the non-herbicide-resistant strain of plants by the resistant strain?
1. The presence of the herbicide in the environment
2. The absence of the herbicide from the environment
3. The maintenance of the proper conditions for one generation
4. The maintenance of the proper conditions for many generations
#Question id: 10642
#Section 2: Evolution
Which curve best describes survivorship in a songbirds and marine crustacean that molts respectively?
#Question id: 11767
#Section 2: Evolution
If a population has a stable age distribution, which of the following statements is true?
#Question id: 3435
#Section 2: Evolution
You turn on a light and observe cockroaches scurrying to dark hiding places. What have you observed?
#Question id: 3420
#Section 2: Evolution
Following are key points about the effect of genetic drift:
A. Genetic drift is significant in small populations.
B. Genetic drift can cause allele frequencies to change in a pre-directed way.
C. Genetic drift can lead to a loss of genetic variation within populations.
D. Genetic drift can cause harmful alleles to become fixed.
Which one of the following combination of the above statements are true?