Check all that apply: Members of the same biological species canA) have several isolated gene pools.B) differ from other species in one or more characteristics.C) generate fertile offspring with the members of a different species.D) interbreed freely with each other.
What will be an ideal response?
A, B, D
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Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe
herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time? A) The percentage of pink flowers should increase over time. B) The percentage of white flowers should increase over time. C) The distribution of flower colors should not change. D) The distribution of flower colors should randomly fluctuate over time.
Under anaerobic conditions, muscle cells produce ____
a. ethyl alcohol b. acetaldehyde c. pyruvate d. lactate e. citrate
Which extraembryonic membrane produces early blood cells and portions of the digestive tract?
a. yolk sac b. amnion c. chorion d. allantois
e. umbilical cordSome protobionts have been shown to have the ALL of following features except
a. divide by binary fission. b. maintain a chemical environment different from their external environment. c. metabolize certain compounds. d. grow in size. e. disorganization