1. Which of the following criteria does the biological species
concept use as the primary means for defining a species?
| a |
Morphological similarity between members |
| b |
Genetic similarity between members |
| c |
Actual or potential reproductive compatibility between
members |
| d |
Similarity in ecological roles or niche between members |
2. Which of the following mechanisms can alter the gene pool
(genetic makeup) of a population over time? (choose all that
apply)
| a |
Differential reproductive success on members of the
population |
| b |
Genetic drift occurring within the population |
| c |
Heritable mutations occurring over time within the
population |
| d |
Random mating between members of a population |
3. Match the following mode of speciation that can come about
from the example given. Allopatric speciation or sympatric
speciation
a. A lake slowly dries up isolating members of a fish species
into various populations now disconnected from each other
b. Genetic duplication within a plant species now causes for
individuals to be reproductively incompatible with members of the
original population
c. A subset of an insect population emerges at higher
temperatures than members of the original population such that they
do not breed at the same time
d. Habitat preferences of a subset of a population slowly change
from the original population, resulting in members breeding in
different habitats within the same geographic area
e. An eight lane highway is built through habitat that now
isolates members of a species of snail on either side
4. Within a hybrid zone, which of the following could lead to
hybrid reinforcement? (choose all that apply)
| a. |
Increased reproductive success of hybrids |
| b. |
Reduced viability of hybrids |
5. A species of long extinct amphibian is unchanged in the
fossil record for a few million of years. Beginning 10 million
years ago, the species vanishes from the fossil record and is not
found in any rocks dating younger than 10 million years old.
Interestingly, at around the time in the fossil record where that
species is no longer found, a new species “appears” that is very
similar to the first species but slightly different. Which of the
following models for evolution best explains this?
| d. |
Punctuated Equilibrium |
