BIO 171- Practice Questions Exam 4 With
Verified And Updated Answers
T/F: A pride of lions moves into a new area of the savanna that was previously a refuge for zebras. Lions
begin killing zebras for food and the zebra population decreases. This is an example of an ecological
disturbance. - answer✔answer: false
Antibiotics can kill _____ in the human body, which may sometimes lead to health problems such as
inflammatory bowel disease.
a. beneficial bacteria
b. harmful bacteria
c. both harmful and beneficial bacteria
d. archaeons
e. fungi - answer✔answer: c
The totality of microbes that reside in/on humans, their genomes, and environmental interactions
between the microbes and their human host are known as:
a. symbiosis.
b. an enterotype.
c. the human microbiome.
d. microbiology. - answer✔answer: c
Disturbances:
a. affect populations differently according to the population's density.
b. involve interactions such as competition and predation.
d. can influence the diversity of species in a community.
e. usually only affect one particular species in a community. - answer✔answer: d
Which of the following is/are disturbances? Choose all that apply.
a. Droughts
b. Road Building
c. Agriculture
d. Volcanic eruptions
e. Earthquakes
f. Hurricanes
g. Fires - answer✔answer: a, b, c, d, e, f, g
Blueberries, almonds, and the berries that hold coffee beans are all fruit. Coffee beans are actually
seeds, which grow inside a berry, which is a fruit. What part of the flower matures into these fruits?
(Choose one.)
a. Ovary
b. Stigma
c. Embryo
d. Anther
e. Petals - answer✔answer: a
Which of the following is a definition of "pollen deposition"? (Choose one.)
a. The total amount of fruit produced by a plant in an agricultural system
b. The amount of pollen deposited on flowers by pollinators
c. The proportion of pollen that matures into fruit
d. The proportion of flowers on a plant that develop into fruit - answer✔answer: b
ALL RIGHTS RESERVED.
Based on Garibaldi et al. 2013 "Wild pollinators enhance fruit set..." pre-discussion reading, which of the
following are accurate descriptions or applications of the concept "ecosystem service"? (Choose all that
are correct.)
a. Pollination by wild insects is an ecosystem service
b. Ecosystem services are often not accounted for when people do market valuations (determine how
much money an ecosystem is worth)
c. An ecosystem service is performed when, for example, Ann Arbor citizens organize a stream clean-up
day for the Huron River. - answer✔answers: a, b
Consider the excerpt from Garibaldi et al. 2013 "Wild pollinators enhance fruit set..." (pre-discussion
reading). Which of the following statement(s) describe(s) this study accurately? ("et al." means "and
colleagues") (Choose all that are correct.)
a. Garibaldi et al. were concerned with the proportion of a plant's flowers that develop into mature
fruits or seeds
b. Garibaldi et al. were concerned with the biodiversity of prairie plants.
c. Garibaldi et al. gathered data about the decline in honey bee hives due to disease and parasitism.
d. Garibaldi et al. measured fruit set in a variety of agricultural crops. - answer✔answer: a, d
Read about the relationships between pollinators, angiosperm plants, flowers, and fruit in How Life
Works. Then, evaluate which of the following statements is a valid description of these relationships.
(Choose one.)
a. Flowers produce pollen; pollen is sperm; pollinators move the pollen to stigmas of flowers; pollen
fertilizes stigmas producing seeds; fruit grows around the seeds, protecting the growing embryo.
b. Flowers produce pollen; pollinators move pollen to stigmas of flowers; pollen produces sperm; sperm
fertilize eggs; diploid zygotes develop into embryos inside seeds; flowers develop into fruit which
surrounds the developing embryo.
c. Flowers produce pollen; pollen is sperm; pollinators take pollen back to their colonies; pollen lands on
stigmas and produces seeds; fruit grows around the seeds.
d. Flowers produce seeds; pollinators bring seeds to flowers; flowers make seeds into fruit; fruit
develops in - answer✔answer: b
An organism that acquires energy from the sun and uses C6H12O6 (glucose) as a carbon source would
be classified as a:
Organisms that derive their energy and carbon from organic compounds are ____________.
a. chemoheterotrophs
b. photoheterotrophs
c. photoautotrophs
d. chemoautotrophs - answer✔answer: a
What term(s) reflect(s) the amount of energy available to herbivores in the biomass of
photoautotrophs?
a. GPP
b. Total ecosystem productivity
c. NPP + Respiration
d. NPP
e. Respiration
f. Both GPP AND NPP + Respiration - answer✔answer: d
Which biochemical process is responsible for oxygenating the Earth's atmosphere?
a. Cellular respiration
b. Nutrient cycling
c. Decomposition
d. Photosynthesis
e. Oxidation - answer✔answer: d
Which of the following domains of life contain photosynthetic organisms? (Choose all that apply)
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