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BIO 201 Final exam October 2020
There are 40 questions.
You have 45 minutes.
1) Two species of plants that do not cross-pollinate because they flower at different times of the year
are an example of what kind of isolation?
A) Behavioural
B) Gametic
C) Spatial
D) Temporal
E) Mechanical isolation
Answer:_____
2) A phylogenetic tree that is "rooted" is one
A) that extends back to the origin of life on Earth.
B) at whose base is located the common ancestor of all taxa depicted on that tree.
C) that illustrates the rampant gene swapping that occurred early in life's history.
D) that indicates our uncertainty about the evolutionary relationships of the taxa depicted on the
tree.
E) with very few branch points
Answer:_____
3) The host range of a virus is determined by
A) the proteins on its surface and that of the host.
B) whether its nucleic acid is DNA or RNA.
C) the proteins in the host's cytoplasm.
D) the enzymes produced by the virus before it infects the cell.
E) the enzymes carried by the virus.
Answer:_____
4) The angiosperms are divided into monocots and dicots, which characteristic is unique to
monocots?
A) Embryo with a single cotyledon.
B) Major leaf veins parallel.
C) Stem vascular bundles scattered.
D) Roots are taproot.
E) Secondary growth absent.
Answer:_____
5) Which of the following is characteristic of the lytic cycle?
A) Many bacterial cells containing viral DNA are produced.
B) Viral DNA is incorporated into the host genome.
C) The viral genome replicates without destroying the host.
D) A large number of phages is released at a time.
E) The virus-host relationship usually lasts for generations.
Answer:_____
6) The last common ancestor of all animals was probably a
A) unicellular chytrid.
B) unicellular yeast.
C) plant.
D) multicellular fungus.
E) flagellated protist.
Answer:_____
7) In the Galapagos, if the original finches that had been blown over from South America had already
been genetically different from the parental population of South American finches, even before
adapting to the Galapagos, this would have been an example of
A) Genetic drift.
B) Bottleneck effect.
C) Founder's effect.
D) All three of these
E) Both A and C
Answer:_____
8) Gene flow is a concept best used to describe an exchange between
A) species.
B) males and females.
C) populations.
D) individuals.
E) chromosomes.
Answer:_____
9) This species concept says something is the same species based on their ability to mate with one
another.
A) Biological
B) Ecological
C) Morphological
D) Phylogenetic
Answer:_____
10)
Which statement about the genomes of prokaryotes is correct?
A) Prokaryotic genomes are diploid throughout most of the cell cycle.
B) Prokaryotic chromosomes are sometimes called plasmids.
C) Prokaryotic cells have multiple chromosomes, "packed" with a relatively large amount of
protein. D) The prokaryotic chromosome is not contained within a nucleus but, rather, is found at
the nucleoid region.
E) Prokaryotic genomes are composed of linear DNA (that is, DNA existing in the form of a line
with two ends).
Answer:_____
11)
Tetrapods are evolved from lobe finned fish. The fossil, Tiktaalik is a link between lobefins
and the early tetrapods showing many modifications later associated with tetrapods. What feature
was not identified in this fossil?
A) Ribs to aid breathing.
B) A neck to increase head movement.
C) The front fins contained bones for opposable thumbs for grasping prey.
D) The arrangement of the pelvis and hind limbs indicated it could walk in shallow water.
Answer:_____
12)
A)
B)
C)
D)
Which of the four phylogenetic groups of the archaea are used to treat sewage?
Halophiles
Methanogens
Thermophiles
Sulphate reducers
Answer:_____
13)
Protists are alike in that all are
A) unicellular.
B) eukaryotic.
C) symbionts.
D) monophyletic.
E) autotrophic.
Answer:_____
14)
A)
B)
C)
D)
E)
The scientific discipline concerned with naming organisms is called
taxonomy.
cladistics.
binomial nomenclature.
systematics.
phylocode
Answer:_____
15)
Which of the following do Gymnosperms not have?
A) A sporophyte generation.
B) Waxy cuticle
C) Fruit
D) Seeds
E) Vascular tissue
Answer: _____
16)
A)
B)
C)
D)
E)
What was the prevailing notion prior to the time of Lyell and Darwin?
Earth is a few thousand years old, and populations are unchanging.
Earth is a few thousand years old, and populations gradually change.
Earth is millions of years old, and populations rapidly change.
Earth is millions of years old, and populations are unchanging.
Earth is millions of years old, and populations gradually change.
Answer: _____
17)
What is the correct sequence of the following four events during an animal's development?
1. gastrulation
2. metamorphosis
3. fertilization
4. cleavage
A) 4 → 3 → 2 → 1
B) 4 → 3 → 1 → 2
C) 3 → 2 → 4 → 1
D) 3 → 4 → 2 → 1
E) 3 → 4 → 1 → 2
Answer: _____
18)
Which is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the
cell and wastes to leave the cell?
A) plasma membrane
B) capsule
C) cell wall
D) nucleoid region
E) pili
Answer: _____
19)
Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy from
fungal heterotrophy is that only animals derive their nutrition
A) from organic matter.
B) by preying on animals.
C) by ingesting it.
D) by consuming living, rather than dead, prey.
E) by using enzymes to digest their food.
Answer: _____
20)
A)
B)
C)
D)
Which one of the following statements about Rotifers is false
Some species only reproduce by parthenogenesis
Sexual reproduction requires a period of dormancy.
They can survive desiccation.
Some are smaller than the unicellular protists.
Answer:_____
21)
A)
B)
C)
D)
E)
There are two mechanisms of speciation. Which of the following is one?
allellopathic
allopatric
peizolectric
sympathetic
tangenital
Answer:_____
22)
A)
B)
C)
D)
E)
Which of the following was not a challenge for survival of the first land plants?
Sources of water.
Sperm transfer.
Dessication.
Animal predation.
Absorbing enough light.
Answer:_____
23)
A)
B)
C)
D)
E)
Which statement about bacterial cell walls is false?
Bacterial cell walls differ in molecular composition from plant cell walls.
Cell walls prevent cells from bursting in hypotonic environments.
Cell walls prevent cells from dying in hypertonic conditions.
Bacterial cell walls are similar in function to the cell walls of many protists, fungi, and plants.
Cell walls provide the cell with a degree of physical protection from the environment.
Answer:_____
24)
A)
B)
C)
D)
E)
Bryophytes have all of the following characteristics except which one?
multicellularity.
specialized cells and tissues.
lignified vascular tissue.
walled spores in sporangia.
a reduced, dependent sporophyte.
Answer:_____
25)
Which cells in a sponge are primarily responsible for trapping and removing food particles
from circulating water?
A) choanocytes
B) mesoglea cells
C) pore cells (porocytes)
D) epidermal cells
Answer:_____
26)
A)
B)
C)
D)
E)
What is the protest causal agent of malaria identified by Sir Ronald Ross?
Dictyostelium
Euglena
Paramecium
Plasmodium
Trypanosome
Answer:_____
27)
A)
B)
C)
D)
E)
Which one of the following statements about fungi is correct?
All are multicellular.
They can break down complex carbohydrates such as lignified wood.
They grow better at pH 9.
They are major pathogens of humans.
They can be controlled using antibiotics.
Answers:_____
28)
The strongest evidence for the endosymbiotic origin of eukaryotic organelles is the similarity
between extant prokaryotes and which of the following?
A) nuclei and chloroplasts
B) mitochondria and chloroplasts
C) cilia and mitochondria
D) mitochondria and nuclei
E) mitochondria and cilia
Answer:_____
29)
A)
B)
C)
D)
E)
Plants with a dominant sporophyte are successful on land partly because
having no stomata, they lose less water.
they all disperse by means of seeds.
diploid plants experience fewer mutations than do haploid plants.
their gametophytes are completely enclosed within sporophyte tissue.
eggs and sperm need not be produced.
Answer:_____
30)
A)
B)
C)
D)
E)
Which of the following does not drive microevolution?
Small sample size.
Random mating.
Mutation.
Gene flow
Natural selection
Answer:_____
31)
A)
B)
C)
D)
E)
Which of the following pairs are the best examples of homologous structures?
bat wing and human hand
owl wing and hornet wing
porcupine quill and cactus spine
bat forelimb and bird wing
Australian mole and North American mole
Answer:_____
32)
A)
B)
C)
D)
E)
In order for speciation to occur, what is true?
The number of chromosomes in the genome must change.
Changes to centromere location or chromosome size must occur within the genome.
Large numbers of genes that affect a single phenotypic trait must change.
Large numbers of genes that affect numerous phenotypic traits must change.
At least one gene, affecting at least one phenotypic trait, must change.
Answer:_____
33)
Which statement about natural selection is most correct?
A) Adaptations beneficial in one habitat should generally be beneficial in all other habitats as well.
B) Different species that occupy the same habitat will adapt to that habitat by undergoing the same
genetic changes.
C) Adaptations beneficial at one time should generally be beneficial during all other times as well.
D) Well-adapted individuals leave more offspring, and thus contribute more to the next
generation's gene pool, than do poorly adapted individuals.
E) Natural selection is the sole means by which populations can evolve.
Answer:_____
34)
A)
B)
C)
D)
E)
Which of the following is a shared characteristic of all chordates?
scales
jaws
vertebrae
dorsal, hollow nerve cord
four-chambered heart
Answer:_____
35)
Which example below will most likely guarantee that two closely related species will persist
only as distinct biological species?
A)
B)
C)
D)
E)
Colonization of new habitats
Convergent evolution
Hybridization
Geographic isolation from one another
Reproductive isolation from one another
Answer:_____
36)
A)
B)
C)
D)
E)
Which of the following statements about plants is false?
All are eukaryotes.
All are photosynthetic.
All are multicellular.
All are terrestrial.
All have alternation of generations.
Answer:______
37)
A)
B)
C)
D)
E)
Who synthesised a theory of natural selection independently of Darwin?
Georges Cuvier
Charles Lyell
Alfred Wallace
Thomas Malthus
John Henslow
Answer:_____
38)
A)
B)
C)
D)
E)
The largest unit within which gene flow can readily occur is a
population.
species.
genus.
hybrid.
phylum.
Answer:_____
39)
When a mycelium infiltrates an unexploited source of dead organic matter, what are most
likely to appear within the food source soon thereafter?
A) Fungal sporangia
B) Fungal enzymes
C) Increased oxygen levels
D) Larger bacterial populations.
Answer:_____
40)
A)
B)
C)
D)
E)
Which of the following statements about viruses are incorrect.
They are not an organısm.
They have no cell structure.
They are obligate intracellualr parasites.
They are self replicating.
They have genetic material.
Answer:_____