plant tophat questions Flashcards
What factors might have made it difficult
for a lineage of algae to invade land?
A. Your cells may dry out
B. You will have less physical support
C. Your sperm will have a hard time
fertilizing eggs
D. All of the above
all of the above
How many spores does a charophyte doing zygotic
meiosis make for each fertilization event?
A. 1
B. 4
C. 16
D. As many as it wants
4
Why did plants get taller?
A. Being taller than competitors is important
B. Getting closer to the sun increases photosynthetic rates
C. To avoid being water-logged
Being taller than competitors is important
Why sporophyte dominance? Which of
these statements is false?
A. Spores, which are dispersed by wind, are dispersed further from
greater heights
B. Larger, branched sporophytes allow the plant to make more spores
per fertilization event
C. Gametophytes are constrained by the need for water (and lack a
vascular system)
D. Sporophytes are haploid, which allows them to respond to changing
environments more rapidly and become dominant
Sporophytes are haploid, which allows them to respond to changing
environments more rapidly and become dominant
Do seed plants (gymnosperms and angiosperms) make spores?
A. No.
B. Yes, but the spores turn directly into seeds
C. Yes, but they are not dispersed
D. Yes, but they become the gametophytes while they are still on the sporophyte
E. C and D
C and D
Yes, but they are not dispersed
AND Yes, but they become the gametophytes while they are still on the sporophyte
What is the ploidy level of endosperm?
A. Haploid (n)
B. Diploid (2n)
C. Triploid (3n)
D. Tetraploid (4n)
Triploid (3n)
Apical buds are an example of meristem tissue
in plants, which means:
A. That they will produce only vascular tissue
B. That the cells are undifferentiated and can form all tissues
C. That the cells are mature and can no longer
divide
D. That the cells are haploid
That the cells are undifferentiated and can form all tissues
Sclerenchyma is a specific type of cell in plants that we have not learned
about today. It functions to hold the plant upright and is often located near
the outside of the stems. What kind of tissue is this?
A. Vascular
B. Dermal
C. Ground
D. Structural
Ground
The increase in girth of woody plants is primarily due to the increase in the production of
a) phloem.
b) xylem.
c) pith.
d) cortical tissue.
e) bark.
xylem
You carve your initials 1.5 m above the ground in a
10-m-tall tree. If you return 20 years later and the
tree is 25 m tall, your initials will be _____ above the
ground.
A. 1.0 m
B. 1.5 m
C. 2.5 m
D. 11.5 m
E. 16.5 m
1.5m
A trunk has 62 rings and a branch has 7. The tree is at least ____ years old.
62
Which zone of primary growth in shoots is auxin affecting?
A. The zone of cell division
B. The zone of elongation
C. The zone of differentiation
D. The zone of development
The zone of elongation
If a tree species makes red leaves one fall and the following fall is much cloudier, what color will the
leaves likely be?
A. More red than the first fall
B. Less red than the first fall
C. The same red as the first fall
D. They would likely stay green
E. Impossible to tell
Less red than the first fall
The spongy mesophyll does not:
A. Perform photosynthesis
B. Contain chloroplasts
C. Allow airspaces for CO2 to diffuse
D. Function primarily to transport water to the palisade cells
E. None of the above (spongy mesophyll does all of
these things)
Function primarily to transport water to the palisade cells
Based on the color of leaves, what color(s) of light
will drive photosynthesis by green plants most
efficiently?
a) red only
b) green only
c) blue only
d) red and blue
red and blue
Why is more light reflected when a leaf is
illuminated from the bottom vs. the top of a leaf?
A. The spongy mesophyll has fewer chloroplasts
B. The spongy mesophyll has more air-water
interfaces that cause more backscatter away from
the palisade mesophyll
C. Because none of the light reaches the palisade
mesophyll
D. The spongy mesophyll contains more water than
the palisade
The spongy mesophyll has more air-water interfaces that cause more backscatter away from
the palisade mesophyll
You are a researcher interested in understanding how plants work. To do so, you
set up an experiment. You start with three groups of seeds, each of which has the
same mass. One set of seeds you place under lights and water them regularly
(light). One set you leave in the dark and water them regularly (dark). The last
set you just leave in the light; no watering (dry). After a week, you dry the plant
material entirely and weigh all three sets. From heaviest to lightest, what’s the
order of the groups of seeds?
Place the groups of seeds in order from heaviest to lightest:
A. Dark
B. Dry
C. Light
heaviest
1. light
2. dry
3. dark
lightest
Why could one consider photorespiration wasteful?
A. It uses O2 and releases CO2
B. It uses CO2 and releases O2
C. It reduces the amount of sugar made per light absorbed
D. A and C.
A and C
It uses O2 and releases CO2 AND It reduces the amount of sugar made per light absorbed
Do C4 plants contain RuBisCO?
A. Yes, just like C3 plants.
B. Yes, but not in mesophyll cells
C. Yes, but not in bundle sheath cells
D. Absolutely not.
Yes, but not in mesophyll cells
Plants that exhibit this photosynthetic pathway have bundle sheath cells
A. C3
B. C4
C. CAM
D. All of the above
E. C4 and CAM
all of the above
Plants that exhibit this photosynthetic pathway fix CO2 from the atmosphere at night
A. C3
B. C4
C. CAM
D. All of the above
E. C4 and CAM
CAM
Plants that exhibit this photosynthetic pathway fix CO2 with PEP carboxylase
A. C3
B. C4
C. CAM
D. All of the above
E. C4 and CAM
C4 and CAM
Mass flow is different than osmosis and
diffusion, because:
A. Both diffusion and osmosis require membranes, but mass flow does
not.
B. Mass flow is driven by a difference in pressure, not water molecule
concentration.
C. Mass flow is driven by random movements of molecules, not
differences in concentration
D. Osmosis is an effective way to study for the exam, mass flow is not.
Mass flow is driven by a difference in pressure, not water molecule
concentration
Which of these statements is true?
A. Water is pushed from the roots to the leaves
B. Water within the plant is compartmentalized in roots,
stems, and leaves and is not in contact throughout the
plant
C. The cohesive property of water is important in xylem
transport, but not the adhesive property
D. Without the tiny menisci in the leaf cell walls to hold the
water in place, the water column would collapse
Without the tiny menisci in the leaf cell walls to hold the
water in place, the water column would collapse
