BIOLOGY II EXAM #2 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
Question:
1. 4 major types of plant organ systems
Answer:
1. reproductive organs
2. leaf
3. stem
4. roots
Question:
2. why are vascular plants better able to sustain
photosynthesis than bryophytes?
Answer:
vascular plants have root systems that help them take up water from the ground
- water is needed for photosynthesis
- bryophytes (nonvascular) can only rely on water on the surface
Question:
3. where does photosynthesis occur?
Answer:
leaf of a plant
Question:
4. transpiration
Answer:
loss of water vapor from leaves
Question:
5. why do plants transpire?
Answer:
CO2 uptake --> carbon atoms used to produce carbohydrates in Calvin Cycle -->
results in water loss
,Question:
6. why are transpiration rates very high?
Answer:
the water vapor concentration gradient
- CO2 concentration difference driving the diffusion of CO2 into the leaf is much
smaller than the concentration difference driving the diffusion of water out of the
cell
Question:
7. 3 major tissues of the leaf
Answer:
1. dermal tissue
2. ground tissue
3. vascular tissue
Question:
8. example of dermal tissue
Answer:
epidermis
Question:
9. epidermis
Answer:
outermost layer of cells
Question:
10. example of ground tissue
Answer:
mesophyll
, Question:
11. mesophyll
Answer:
tissue of loosely packed photosynthetic cells
Question:
12. example of vascular tissue
Answer:
xylem, phloem
Question:
13. veins
Answer:
system of vascular conduits within the leaf
Question:
14. how do plants sustain such high rates of water loss?
Answer:
by obtaining water from the soil
Question:
15. 2 structures that help minimize water loss
Answer:
1. stomata
2. waxy cuticle
Question:
16. pores in the epidermis
- allows gasses to diffuse into/out of the leaf
- compromises b/n minimizing water loss & providing CO2 uptake
- open/closes to maintain water balance
Answer:
stomata
AND CORRECT ANSWERS
Question:
1. 4 major types of plant organ systems
Answer:
1. reproductive organs
2. leaf
3. stem
4. roots
Question:
2. why are vascular plants better able to sustain
photosynthesis than bryophytes?
Answer:
vascular plants have root systems that help them take up water from the ground
- water is needed for photosynthesis
- bryophytes (nonvascular) can only rely on water on the surface
Question:
3. where does photosynthesis occur?
Answer:
leaf of a plant
Question:
4. transpiration
Answer:
loss of water vapor from leaves
Question:
5. why do plants transpire?
Answer:
CO2 uptake --> carbon atoms used to produce carbohydrates in Calvin Cycle -->
results in water loss
,Question:
6. why are transpiration rates very high?
Answer:
the water vapor concentration gradient
- CO2 concentration difference driving the diffusion of CO2 into the leaf is much
smaller than the concentration difference driving the diffusion of water out of the
cell
Question:
7. 3 major tissues of the leaf
Answer:
1. dermal tissue
2. ground tissue
3. vascular tissue
Question:
8. example of dermal tissue
Answer:
epidermis
Question:
9. epidermis
Answer:
outermost layer of cells
Question:
10. example of ground tissue
Answer:
mesophyll
, Question:
11. mesophyll
Answer:
tissue of loosely packed photosynthetic cells
Question:
12. example of vascular tissue
Answer:
xylem, phloem
Question:
13. veins
Answer:
system of vascular conduits within the leaf
Question:
14. how do plants sustain such high rates of water loss?
Answer:
by obtaining water from the soil
Question:
15. 2 structures that help minimize water loss
Answer:
1. stomata
2. waxy cuticle
Question:
16. pores in the epidermis
- allows gasses to diffuse into/out of the leaf
- compromises b/n minimizing water loss & providing CO2 uptake
- open/closes to maintain water balance
Answer:
stomata
