3 Written questions
4 Matching questions
- permafrost; temperatures range from approximately -50c to 25c. growing season of 60 days or less
A. tropical rain forest
C. arctic tundra
D. temperate grassland
- the difference in cricket calls among sympatric species of crickets are examples of
B. temporal isolation
C. physiological isolation
D. behavioral isolation
E. geographical isolation
- assuming that the population was in HWE for the g locus, what was the frequency of allele g in the moths that emerged in 1980?
- the independent development of similarities between unrelated groups resulting from adaptation to similar environments
A. founder effect
B. kin selection
C. competitive exclusion
D. adaptive radiation
E. convergent evolution
- a B
- b C
- c E
- d D
5 Multiple choice questions
5 True/False questions
in the nitrogen cycle, the transformation of gaseous nitrogen into nitrogen-containing compounds is performed primarily by:
C. green plants
E. carnivores → B
which of the following best supports the statement that mitochondria are descendants of endosymbiotic bacteria-like cells?
A. mitochondria and bacteria possess similar ribosomes and DNA
B. mitochondria and bacteria possess similar nuclei
C. glycolysis occurs in both mitochondria and bacteria
D. both mitochondria and bacteria have microtubules
E. neither mitochondria nor bacteria possess chloroplasts → E
for some traits such as birth weight, natural selection favors individuals that are average and the extremes are selected against this is known as:
A. diversifying selection
B. directional selection
C. adaptive radiation
D. disruptive selection
E. stabilizing selection → E
A LARGE POPULATION OF LAB AANIMALS HAS BEEN ALLOWED TO BREED RANDOMLY FOR A NUMBER OF GENERATIONS. AFTER SEVERAL GENERATIONS, 49% OF THE ANIMALS DISPLAY A RECESSIVE TRAIT aa THE SAME PERCENTAGE AS AT THE BEGGINING OF THE BREEDING PROGRAM. THE REST OF THE ANIMALS SHOW THE DOMINANT PHENOTYPE, WITH HETEROZYGOTES INDISTINGUISHABLE FROM THE HOMOZYGOUS DOMINANTS.
what is the estimated frequency of allele a in the gene pool?
E. 0.07 → B
For a population in Hardy-Weinberg equilibrium, the frequency of the recessive allele:
A. increases with each generation until it reaches 50%
B. decreases each generation until it reaches 25%
C. remains the same in every generation.
D. decreases due to negative selection pressure on homozygous recessive individuals.
E. increases due to the occurence of new mutations → E