Name: ___________________________
Gr.12 Biology Unit 3: Evolution (Ch.27)
Section A: Multiple Choice (14 marks) Circle the BEST answer.
1. The Miller-Urey experiments used the following reactants:
a. CH4, NH3, H2, H20 in the absence of O2
b. CH4, NH3, H2, H20 in the presence of O2
c. CH4, NH4, H2 only
d. CH4, NH4, H20 in the absence of O2
2. The protein-first hypothesis is supported by the discovery of:
a. Ribozymes
b. Protenoids
c. Nucleic acid polymerization
d. Polypeptides
3. The protocell likely would have had:
a. A lipid-protein membrane
b. No membrane
c. A lipid-only membrane
d. A protein-only membrane
4. All true cells:
a. Absorb nutrients
b. Synthesize sugars
c. Export minerals
d. Replicate DNA
e. Have at least 100 friends on Facebook
5. There have likely been _____ mass extinctions in Earth’s history:
a. 4
b. 5
c. 3
d. 7
6. Fossils that serve as transitional links allow scientists to:
a. Understand how climate affects evolution
b. Identify the relative age (relative dating) of fossils
c. Deduce why evolution occurred
d. Identify the absolute age (absolute dating) of fossils
e. Feel really good. It usually leads to them looking into the mirror and giving themselves a
high five.
7. The absolute dating method:
a. Uses C-14
b. gives a precise age of a fossil
c. Uses C-12
d. Gives an approximate age of a fossil, when compared to other fossils
e. Can only be used for VERY old fossils
f. Only a,b and e are true
g. Only a,c and d are true
h. Only a and b are true
i. Only c is false
8. The wing of an insect and the wing of a bat are (these two organisms do NOT share a common
ancestor) :
a. Analogous structures
b. Evidence of a common ancestor
c. Homologous structures
d. Homogeneous structures
9. What is NOT a piece of evidence of evolution:
a. Biogeographical Evidence
b. Biochemical Evidence
c. Anatomical Evidence
d. Biotechnology Evidence
10. With disruptive selection (a type of natural selection):
a. Extreme phenotypes are selected against
b. One extreme phenotype is favoured
c. Two extreme phenotypes are favoured
d. Involves random mating
11. In what individuals does variation be maintained:
a. Heterozygote
b. Homozygous dominant
c. Homozygous recessive
d. Monoploidy
12. What is NOT a type of adaptation:
a. Behavioural
b. Physiological
c. Geographical
d. Structural
13. If a species resembles another species, this type of adaptation is called:
a. Mimicry
b. Camouflage
c. Cryptic
d. Being sneaky…very sneaky
14. What are the Domains used in classification:
a. Bacteria
b. Archaea
c. Protista
d. Eukarya
e. Only a, b and c are true
f. Only a and b are true
g. Only a, b, and d are true
h. Only b and d are true
Section B: Short Answer (19 marks)
Answer the following questions. You may use point form if you wish.
15. What is the difference between a scientific hypothesis and a scientific theory? (1)
16. Define biological evolution. (2)
17. What is meant by “fitness” in biology? Who came up with the concept of “survival of the
fittest”? (2)
18. List the 5 conditions that need to be met for Hardy-Weinberg equilibrium. (5)
19. Define adaptive radiation and give an example. (2)
20. What is the difference between allopatric and sympatric speciation? (2)
21. List and describe the three types of selection? (3)
22. Define and give an example of artificial selection (2)
Part C: Long Answer (5 marks each = 10 marks)
23. Answer TWO of the following questions on looseleaf/foolscap provided.
a. Compare and contrast classic Linnean taxonomy and phylogenetic systems of naming
and classifying organisms.
b. What are the four main requirements for natural selection to occur? List and explain
each. Who is credited for coming up with idea of natural selection? (5)
c. What is meant by “prezygotic isolating mechanisms” in terms of reproductive isolation?
List the four types of prezygotic isolation, and give an example of each. (5)
d. A population of mice can be grey (bb) or brown (BB, Bb) in phenotype. According to
Hardy-Weinberg principles (and assuming all the criteria are met), what would be the
allelic frequencies of the following population? Show your work (like maybe a Punnett
square or something…) (5)
Population genotype frequencies: BB= 0.25, Bb=0.25, bb=0.5
24. “Trouble in Paradise” response (5)
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