BIO 109 EXAM REVIEW QUESTIONS
AND ANSWERS
What effect does pruning or "pinching back" have on a houseplant? - ANSWER-It
increases apical dominance.
It inhibits the growth of lateral buds.
Correct!\ Answer It makes the plant grow fuller.
It makes the plant grow taller.
Starting from the tip of a developing root in a typical angiosperm and moving to the
above-ground stem, what is the correct order of structures? - ANSWER-root cap,
zone of maturation (differentiation), zone of cell division, zone of elongation.
Correct Answer root cap, zone of cell division, zone of elongation, zone of maturation
(differentiation).
root cap, zone of cell division, zone of maturation (differentiation), zone of
elongation.
zone of cell division, root cap, zone of maturation (differentiation), zone of
elongation.
zone of cell division, zone of elongation, zone of maturation (differentiation), root
cap.
Annual rings are distinct traits in plants growing in: - ANSWER-Correct Answer
temperate regions
grasslands
tropical regions
arctic regions
desert regions
Based on the ABC model, what would be the structure of a flower (in a cross-section
of the flower, from the outside to the center) that had normal expression of genes A
and C but lacked expression of gene B? - ANSWER-carpel-petal-petal-carpel
carpel-stamen-stamen-carpel
sepal-petal-petal-sepal
Correct Answer sepal-sepal-carpel-carpel
carpel-stamen-carpel-stamen
A molecule in a plant is transported by staying within the cell wall and extracellular
space. This molecule has taken which transport route? - ANSWER-transmembrane
symplastic
Correct Answer apoplastic
protoplastic
iconoplastic
A plant cell with a solute potential of -0.30 MPa maintains a constant volume when
bathed in a solution that has a solute potential of -0.20 MPa and is an open
container. What do we know about the cell? - ANSWER-MPa maintains a constant
volume when bathed in a solution that has a solute potential of -0.20 MPa and is an
open container. What do we know about the cell?
, The cell has a water potential of 0 MPa.
Correct Answer The cell has a pressure potential of +0.10 MPa.
The cell has a water potential of -0.50 MPa.
The cell has a pressure potential of +0.60 MPa.
The cell has a water potential greater than that of the surrounding solution.
Which of the following phenomena is/are involved in the ascent of xylem sap? -
ANSWER-adhesion
cohesion
transpiration
Correct Answer all of the above
Which statement most accurately describes the Casparian strip? - ANSWER-It is
located in the walls between epidermal cells and cells of the cortex.
It provides energy for the active transport of minerals into the stele from the cortex.
It ensures that all minerals are absorbed from the soil in equal amounts.
Correct Answer It ensures that all water and dissolved substances must pass
through a cell membrane before entering the stele.
It provides increased surface area for the absorption of mineral nutrients.
Under which of the following conditions will stomata generally be "closed"? -
ANSWER-when guard cells are turgid (full of water)
when guard cells have low amounts of potassium ions (K+) inside them.
Correct Answer at night, when guard cells have low amounts of potassium ions (K+)
inside them.
at night, when guard cells are turgid (full of water) and have low amounts of
potassium ions (K+) inside them.
When a growing shoot's stem slows its elongation and becomes thicker, the shoots'
cells are responding to: - ANSWER-IAA
Correct Answer: ethylene
carbon dioxide
gibberellins
abscisic acid
Where would you expect to find the littoral zone of a lake? - ANSWER-Correct
Answer: the shallow water region along the shore
the open water region farther from shore with enough sunlight for photosynthesis
the deepest region, where light typically does not penetrate effectively
the bottom region where organisms tend to attach themselves to one spot
near the thermocline
Which of the following are important biotic factors that can affect the structure and
organization of biological communities? - ANSWER-light intensity and seasonality
availability of minerals and soil pH
Correct Answer: predation and competition
precipitation and wind
temperature and water availability
AND ANSWERS
What effect does pruning or "pinching back" have on a houseplant? - ANSWER-It
increases apical dominance.
It inhibits the growth of lateral buds.
Correct!\ Answer It makes the plant grow fuller.
It makes the plant grow taller.
Starting from the tip of a developing root in a typical angiosperm and moving to the
above-ground stem, what is the correct order of structures? - ANSWER-root cap,
zone of maturation (differentiation), zone of cell division, zone of elongation.
Correct Answer root cap, zone of cell division, zone of elongation, zone of maturation
(differentiation).
root cap, zone of cell division, zone of maturation (differentiation), zone of
elongation.
zone of cell division, root cap, zone of maturation (differentiation), zone of
elongation.
zone of cell division, zone of elongation, zone of maturation (differentiation), root
cap.
Annual rings are distinct traits in plants growing in: - ANSWER-Correct Answer
temperate regions
grasslands
tropical regions
arctic regions
desert regions
Based on the ABC model, what would be the structure of a flower (in a cross-section
of the flower, from the outside to the center) that had normal expression of genes A
and C but lacked expression of gene B? - ANSWER-carpel-petal-petal-carpel
carpel-stamen-stamen-carpel
sepal-petal-petal-sepal
Correct Answer sepal-sepal-carpel-carpel
carpel-stamen-carpel-stamen
A molecule in a plant is transported by staying within the cell wall and extracellular
space. This molecule has taken which transport route? - ANSWER-transmembrane
symplastic
Correct Answer apoplastic
protoplastic
iconoplastic
A plant cell with a solute potential of -0.30 MPa maintains a constant volume when
bathed in a solution that has a solute potential of -0.20 MPa and is an open
container. What do we know about the cell? - ANSWER-MPa maintains a constant
volume when bathed in a solution that has a solute potential of -0.20 MPa and is an
open container. What do we know about the cell?
, The cell has a water potential of 0 MPa.
Correct Answer The cell has a pressure potential of +0.10 MPa.
The cell has a water potential of -0.50 MPa.
The cell has a pressure potential of +0.60 MPa.
The cell has a water potential greater than that of the surrounding solution.
Which of the following phenomena is/are involved in the ascent of xylem sap? -
ANSWER-adhesion
cohesion
transpiration
Correct Answer all of the above
Which statement most accurately describes the Casparian strip? - ANSWER-It is
located in the walls between epidermal cells and cells of the cortex.
It provides energy for the active transport of minerals into the stele from the cortex.
It ensures that all minerals are absorbed from the soil in equal amounts.
Correct Answer It ensures that all water and dissolved substances must pass
through a cell membrane before entering the stele.
It provides increased surface area for the absorption of mineral nutrients.
Under which of the following conditions will stomata generally be "closed"? -
ANSWER-when guard cells are turgid (full of water)
when guard cells have low amounts of potassium ions (K+) inside them.
Correct Answer at night, when guard cells have low amounts of potassium ions (K+)
inside them.
at night, when guard cells are turgid (full of water) and have low amounts of
potassium ions (K+) inside them.
When a growing shoot's stem slows its elongation and becomes thicker, the shoots'
cells are responding to: - ANSWER-IAA
Correct Answer: ethylene
carbon dioxide
gibberellins
abscisic acid
Where would you expect to find the littoral zone of a lake? - ANSWER-Correct
Answer: the shallow water region along the shore
the open water region farther from shore with enough sunlight for photosynthesis
the deepest region, where light typically does not penetrate effectively
the bottom region where organisms tend to attach themselves to one spot
near the thermocline
Which of the following are important biotic factors that can affect the structure and
organization of biological communities? - ANSWER-light intensity and seasonality
availability of minerals and soil pH
Correct Answer: predation and competition
precipitation and wind
temperature and water availability
