The range of a population
A. only changes after a disaster has wiped out a former range.
B. only changes due to iteroparity.
C. is stable and almost never changes.
D. changes over time due to external events.
E. is very fluid and changes frequently in a random fashion.
Answer: D
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A close evolutionary relationship between annelids and mollusks is suggested by the presence of a _____ larva in both phyla as well as by molecular sequence comparisons
A. trochophore B. lophophore C. radula D. bivalve E. none of these
A prion is a(n)
A) very small virus. B) a virus built only of protein. C) infectious protein. D) a subatomic particle, along with a neutron and an electron.
During which meiotic phase does crossing over occur?
A) anaphase I of meiosis I B) anaphase II of meiosis II C) prophase I of meiosis I D) prophase II of meiosis II
The ____ is responsible for the separation of the chromosomes during the ____ of mitosis
a. cell wall; anaphase b. mitotic spindle; interphase c. mitotic spindle; anaphase d. kinetochore; prophase e. centromere; telophase