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Practice Final
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Iowa State University
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Aubrie
Biology 211
Hofmockel
12-8-10
4. All of the following statements about biomes are correct except:
A. Climographs are often used to demonstrate climatic differences between biomes.
B. Temperature and precipitation account for most of the variation between biomes.
C. Biomes can be recognized as separate entities because they have sharp, welldefined boundaries.
D. Biomes are major terrestrial communities.
E. Within biomes there may be extensive patchiness.
5. Dwarf mistletoes are flowering plants that grow on certain forest trees. They obtain nutrients
and water from the vascular tissues of the trees. The trees derive no known benefits from the
dwarf mistletoes. Which of the following best describes the interactions between dwarf
mistletoes and trees?
A. facilitation
B. competition
C. mutualism
D. parasitism
E. commensalisms
7. A population of ground squirrels has an annual per capita birth rate of 0.02 and an annual per
capita death rate of 0.06. Estimate the number of individuals added to (or lost from ) this
population of 1,000 individuals in one year.
A. 20 individuals added
B. 20 individuals lost
C. 40 individuals added
D. 40 individuals lost
E. 60 individuals added
8. The benthic zone in an aquatic biome
A. is where one would most expect to find a thermocline.
B. is the site of most photosynthesis within the biome.
C. often supports communities of organisms that feed largely on detritus.
D. B and C only are correct.
E. A, B, and C are correct.
14. Species that are in the same ________ are more closely related to one another than are
species that are only in the same _______.
A. phylum…class
B. family …order
C. class…order
D. family…genus
E. kingdom…phylum
15. Annelids are abundant and successful organisms characterized accurately by all of the
following except
A. some parasitic forms
B. a complete digestive system
C. segmentation
D. a cuticle made of chitin
E. a hydrostatic skeleton
18. Which of the following is a result of biological magnification?
A. Energy is lost at each trophic level of a food chain
B. Nutrients are being removed from agricultural lands and into aquatic ecosystems
C. Top-level predators may be most harmed by toxic environmental chemicals
D. DDT has spread throughout every ecosystem an is found in almost every organism
E. The greenhouse effect will be most significant at the poles
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19. Which of the following characterizes relatively K-selected populations?
A. early parental reproduction
B. offspring with good chances of survival
C. small offspring
D. a high intrinsic rate of increase
E. many offspring per reproduction episode
20. A survivorship curve that involves producing large numbers of offspring, each with a very
low probability of surviving to adulthood , is typical of
A. oysters
B. whales
C. elephants
D. cats
E. humans
21. Species richness increase
A. as community size decreases
B. as rates of evaporation decrease
C. on islands as island distance from the mainland increases
D. as one travels north form the South Pole to the equator
E. as one travel north from the equator
22. Within any given type of terrestrial biome
A. there is little or no vertical stratification
B. periodic disturbance is rare
C. species composition is typically uniform D. both B and C are true
E. non of the above is true
24. Base on current evidence, which of the following statements best describes the evolution of
humans?
A. Humans evolved in a single, orderly series of stages in which each stage became more
advanced than its predecessor
B. The various characteristics that we associate with humans evolved in unison over long
periods of time
C. Humans and apes diverged from a common ancestor about 5-7 million years ago
D. Humans are more closely related to gorillas than to chimpanzees
E. Humans evolved from the chimpanzee.
25. Which of the following is the unit of evolution? In other words, which of the following can
evolve in the Darwinian sense?
A. gene
B. chromosome
C. individual
D. population
E. species
27. In a species of intertidal marine snails, shell color is determined by a single gene with two
alleles. Homozygous recessive individuals produce yellow shells, whereas gray-black shells are
produced by homozygous dominant and heterozygous individuals. In a population of these
diploid snails, 4% of the snails have yellow shells. The frequency of the yellow-shell allele in
this population is
A. 2%
B. 4%
C. 8%
D. 20%
E. 40%
29. All bryophytes (mosses, liverworts, an hornworts) share certain characteristics. These
include:
A. reproductive cells in multicellular gametangia B. branched sporophytes
C. lignified walls
D. vascular tissues, true leave and a waxy cuticle. E. seeds.
30. Which of the following organisms does not reproduce cells by mitosis and cytokinesis?
A. banana tree
B. bacterium
C. cockroach
D. cow
E. mushroom
32. Tropical grasslands with scattered trees are also known as
A. chaparrals
B. tundras
C. savannas D. prairies
E. taigas
33. Which statement about dispersal is incorrect?
A. Dispersal is a common component of the life cycles of plants and animals.
B. Colonization of devastated areas after volcanic eruptions depends on dispersal.
C. Dispersal occurs only on an evolutionary time scales.
D. Seeds are important dispersal stages in the life cycles of most flowering plants.
E. The ability to disperse can limit the geographic distribution of a species.
35. Thorough mixing of water in temperate lakes during the spring and fall turnovers is made
possible by which of the following?
A. seasonally changing water temperature profiles.
B. currents generated by planktonic algae. C. warm water layered at the top.
D. cold water layered at the bottom.
E. a pronounced thermocline under the surface.
36. Which of the following is not an abiotic factor that shapes ecosystems?
A. soil minerals
B. predators
C. fire
D. rainfall
E. volcanic eruptions
39. Plantlike photosynthesis that releases oxygen gas (O2) occurs in the
A. heterotrophic bacteria
B. zygomycetes
C. ciliate
D. cyanobacteria
E. yeasts
40. Both echinoderm and cnidarian adults have radially symmetrical bodies. This is an example
of:
A. coevolution
B. mutualism
C. convergent evolution
D. common ancestry
E. competition
42. Angiosperms are the most successful terrestrial plants. This success is associated with all of
the following except
A. xylem with vessels.
B. sperm cells with flagella C. animal pollination
D. reduced gametophytes
E. fruits enclosing seeds.
45. All of the following statements about the method of feeding in the Cestoidea (tapeworms)
are true except:
A. They are parasites.
B. They absorb nutrients across the walls of their bodies.
C. They lack a digestive tract.
D. They subsist on undigested food.
E. As adults, they live in a digestive tract.
----end first round of questions---
1. A life cycle that can be described as alternation of generations with a dominant
gametophyte generation characterizes:
a. Bryophyte
b. Gymnosperm
c. Angiosperm
d. Dinoflagellates
e. None of the above
2. All plants have all of the following features except:
a. Cellulose in their cell walls
b. Reproduction by way of seeds
c. Alternation of generations
d. All plants have all of the above features
3. In plants, spores are __ and produced by __; gametes are __ and produced by __.
a. Haploid, mitosis; haploid mitosis
b. Haploid, meiosis; haploid meiosis
c. Diploid, mitosis; haploid, mitosis
d. Haploid, meiosis; haploid, mitosis
4. Fungi play the role of:
a. Decomposers
b. Pathogens
c. Food source
d. All of the above
5. ____ compose the ____ of fungi.
a. Hyphae, spores
b. Mycelium, hyphae
c. Hyphae, mycelium
d. Fruiting bodies, hyphae
6. Which of the following shows the correct order of embryonic development?
a. Zygote, blastula, 8-cell stage, gastrula, gastrulation
b. Zygote, 8-cell stage, blastula, gastrulation, gastrula
c. Zygote, blastula, gastrulation, gastrula, 8-cell stage
d. 8-cell stage, zygote, gastrualtion, gastrula, blastula
7. Deuterostomes develop the ___ first and have ___, ___ cleavage.
a. Mouth, radial, determinant
b. Mouth, spiral, determinant
c. Anus, radial, indeterminant
d. Anus, radial, determinant
e.
8. sponges lack what defining characteristic?
a. Choanocytes
b. Cnidocytes
c. True tissues
d. Bilateral symmetry
9. Name the germ layers from the outside to inside
a. Mesoderm, ectoderm, endoderm
b. Ectoderm, mesoderm, endoderm
c. Endoderm, mesoderm, ectoderm
d. Ectoderm, endoderm, mesoderm
10. What is the difference between an acoelomate and a coelomate?
a. Acoelomate has a body cavity
b. Acoelomate lacks a body cavity
c. Coelomate has true tissue
d. Coelomate lacks true tissue
11. In mitosis, __, __ cells are produced; in meiosis, __, __ cells are produced.
a. 4, haploid; 4 diploid
b. 2 haploid; 4 diploid
c. 4 diploid; 2 haploid
d. 2 diploid, 4 haploid
12. Genes that occur on the X chromosome and not on the Y chromosomes are ___.
a. Nondisjuction
b. Mutated
c. Sex-linked
d. Recombined
13. A heterozygous individual is crossed with a homozygous dominant individual. What is
the probability of getting a heterozygote offspring?
a. 0
b. .25
c. .5
d. .75
14. In a dihybrid cross of heterozygote, what proportion of the offspring will be
phenotypically dominant for both traits?
a. 1/16
b. 3/16
c. 1/4
d. 9/16
15. Meiosis II is similar to mitosis because
a. Sister chromatids separate
b. Homologous chromosomes separate
c. DNA replication precedes the division
d. They both take the same amount of time
16. Zero population growth occurs when:
a. K=0
b. N=0
c. N=K
d. No organisms enter or leave
17. Photoheterotrophs get their carbon from ___ and their energy from___.
a. CO2, sunlight
b. Organic sources, sunlight
c. CO2, chemical sources
d. Organic sources, CO2
18. Where is food stored in the dicot seed?
a. Roots
b. Stem
c. Cotyledons
d. Endosperm
19. A stamen is composed of:
a. Stigma, style, ovary
b. Petals, sepals
c. Carpel, sepal, ovule
d. Anther, filament
20. What is lichen composed of?
a. Algae and roots
b. Fungus and algae
c. Hyphae and mycelium
d. Plant and bacteria
21. Eumetazoa are divided into the groups
a. Protostome and deuterostome
b. Metazoan and ametazoa
c. Lophotrophozoa and ecdysozoa
d. Radiata and bilateria
22. Which is the correct order of interphase?
a. S, G1, G2, mitosis
b. G1, G2, mitosis, S
c. G1, S, G2, mitosis
d. S, mitosis, G1, G2
23. Cryptic coloration could be renamed:
a. Batesian mimicry
b. Camouflage
c. Mullerian mimicry
d. You cant see me
e.
24. All populations in an area plus the abiotic elements compose the:
a. Community
b. Biosphere
c. Ecosystem
d. Population
25. Where do microtubules attach on a tetrad?
a. At the ends
b. At the centromere
c. At the kinetochore
d. At the centrosome
26. if the birth rate is higher than the death rate:
a. The population will remain the same
b. The population will increase
c. The population will decrease
d. Not enough information
27. Which of the following effects result in a loss of genetic variation?
a. Recombination
b. Bottleneck effect
c. Founder effect
d. Both B and C
28. When a population is geographically divided, ___ may occur.
a. Loss of genetic variation
b. Gain of genetic variation
c. Allopatric speciation
d. Sympatric speciation
----end second set of questions---
Good luck on the final! It’s been a great semester with you guys!