Three populations of crickets look very similar, but the males have courtship songs that sound different. What function would this difference in song likely serve if the populations came in contact?

Charles Darwin collected many birds from the Galapagos Islands. If he sorted them out into species on the basis of their wingspans and beak size, then he would be defining
A) biological species
B) phylogenetic species
C) morphological species
D) biogeographical species
E) ecological species

In a given plant population, the gene that determines height has two alleles, H and h. In one generation, H has a frequency of p=0.8 and h has a frequency of q=0.2. in the next generation, p=0.7 and q=0.3. Is this population in Hardy- Weinberg equilibrium? Why or why not?

Lamarck's ideas about evolution were similar to Darwin's because they emphasized:
A) competition
B) population size
C) mutations
D) adaptation
E) genotypes

The smallest biological units that can evolve are
A) individual organisms
B) individual phenotypes
C) species
D) populations
E) individual genotypes

The production of sterile mules by interbreeding between female horses and male donkeys is an example of _______

A species with two extreme phenotypes is a result of...
A) gene selection
B) stabilizing selection
C) directional selection
D) disruptive selection

What are the five criteria for Hardy Weinberg Equilibrium?

Many crustaceans (for example, lobsters, shrimp, and crayfish) use their tails to swim, but crabs have reduced tails that curl under their shells and are not used in swimming. This is an example of _____.
A) convergent evolution
B) a vestigial trait
C) natural selection
D) a homologous structure

What is the binomial naming system in order?

Name all the pre-zygotic reproductive barriers.

How has sexual dimorphism complicated species classification?
A) different stages of development look so different that they were thought to be different species.
B) species diverge from each other because of different mating behaviors
C) different sexes look so different they were thought to be different species
D) different behaviors between sexes make it difficult for mating

What are the two equations you use to solve Hardy Weinberg Equilibrium calculations?

When natural selection is at work, the individuals with the higher relative fitness are those who, compared to others in their population
A) are better at competing with others for food
B) are leaving more viable offspring to the next generation
C) have the better genes for survival in the environment
D) are stronger and smarter

All homologous anatomical traits are
A) similar in form
B) similar in location
C) similar in function
D) all of the answer choices are correct
E) derived from a common ancestral trait

One species of buttercup plant is found in well-drained soils along hillsides, while a closely-related species of buttercup thrives only in soggy areas of the floodplain along the nearby river. These two species are most likely maintained as separate biological species because of

Which type of selection results in greater genetic variance in a population?
A) stabilizing selection
B) directional selection
C) disruptive selection
D) positive frequency-dependent selection

In a certain population, the dominant phenotype of a certain trait occurs 91% of the time. What is the frequency of the dominant allele?

Evidence that walruses and dogs have a common ancestor includes the fact that the walrus tusks from the same type of tooth buds that grow into the dog's "canine" teeth. Therefore we can say that the walrus tusk and the dog canine tooth are
A) analogous structures
B) homologous structures
C) vestigial structures
D) convergent structures
E) caused by independent mutations

Which of the following about evolution via natural selection is TRUE?
A) Evolution sets out to make the perfect organisms.
B) Evolution is not goal oriented.
C) Humans are the most evolved of all living organisms. (Evolutionary end product).
D) Evolution via natural selection provides a strong theory for how life was created

Which of the following statements describes mechanical isolation as a prezygotic barrier?
A) two species live in different habitats
B) two species mate at different times
C) two snails have shells that spiral in different directions
D) two species share courtship activities.

Sympatric speciation....
A) can derive from polyploidy
B) is when species are separated by physical barriers
C) is caused by the founder effect
D) is when species live in the same place

In a certain population of 1000 fruit flies, 640 have red eyes while the remainder have sepia eyes. The sepia eye trait is recessive to red eyes. How many individuals would you expect to be homozygous for red eye color?

Which of the following must exist in a population before natural selection can act upon that population?
A) genetic variation among individuals
B) variation among individuals caused by environmental factors
C) sexual reproduction
D) All of the above

A hummingbird and a red-tailed hawk are classified into different Families. Therefore, they CANNOT be in the same
A) order
B) phylum
C) class
D) kingdom
E) genus