2024 BIOLOGY 1108 SUSAN
HERRICK EXAM 2 WITH
CORRECT ANSWERS
pholem functions in the long distance transport of "phloem sap" - CORRECT
ANSWERS-sugars
amino acids
other PSN compounds
What major challenge for photosynthesis did land plants face during
evolution? - CORRECT ANSWERS-How to get enough CO2 without drying out
What are the two branches of land plants? - CORRECT ANSWERS-bryophytes
vascular plants
What are the 4 major groups of vascular plants? - CORRECT ANSWERS-
lycophytes
ferns & horsetails
gymnosperms
angiosperms
What are the two treachery elements and their functions? - CORRECT
ANSWERS-Tracheids & Vessels
Both are DEAD, water-conducting cells
What is the force that pulls water from the soil? - CORRECT ANSWERS-
capillary action (thin, narrow tubes allow water to be transported to taller
locations)
Risks to xylem conduits? - CORRECT ANSWERS-air
freezing
dehydration
Function of phloem - CORRECT ANSWERS-transports carbohydrates to non-
photosynthetic portions of a plant for growth and respiration
phloem anatomy - CORRECT ANSWERS-sieve element
companion cell
, plasmodesmata
sieve plate
What are the two main structures on the surface of a leaf? - CORRECT
ANSWERS-cuticle
stomata
The cuticle and stomata help in regulating CO2 ______ and water ______. (gain
or loss) - CORRECT ANSWERS-gain, loss
What are the 3 functions of a leaf? - CORRECT ANSWERS-gas exchange
photosynthesis
transpiration
Why does CO2 uptake in leaves depend of the plants water supply? -
CORRECT ANSWERS-gradients
What is the purpose of columnar arrangement near the upper surface of a
leaf? - CORRECT ANSWERS-maximized light interception
What is the purpose of mesophyll cells? - CORRECT ANSWERS-spread CO2
throughout the leaf
How do guard cells work? - CORRECT ANSWERS-when water escapes the
cells, they shrink, causing the stomata to open. once the cell fills with water,
it will swell, causing the stomata too close.
Why would a leaf need to control the opening to the leaf tissue? - CORRECT
ANSWERS-minimize water loss
What is CAM photosynthesis? - CORRECT ANSWERS-Stomata open at night to
collect CO2, it is stored for photosynthesis usage during the day.
What plants use CAM photosynthesis? - CORRECT ANSWERS-plants that are
adapted to humid/tropical environments (cacti, pineapple)
Why do some plants use CAM photosynthesis? - CORRECT ANSWERS-to
minimize photorespiration
Drawback of using CAM photosynthesis? - CORRECT ANSWERS-more energy
usage
What is the main difference between C4 PSN and CAM PSN? - CORRECT
ANSWERS-
HERRICK EXAM 2 WITH
CORRECT ANSWERS
pholem functions in the long distance transport of "phloem sap" - CORRECT
ANSWERS-sugars
amino acids
other PSN compounds
What major challenge for photosynthesis did land plants face during
evolution? - CORRECT ANSWERS-How to get enough CO2 without drying out
What are the two branches of land plants? - CORRECT ANSWERS-bryophytes
vascular plants
What are the 4 major groups of vascular plants? - CORRECT ANSWERS-
lycophytes
ferns & horsetails
gymnosperms
angiosperms
What are the two treachery elements and their functions? - CORRECT
ANSWERS-Tracheids & Vessels
Both are DEAD, water-conducting cells
What is the force that pulls water from the soil? - CORRECT ANSWERS-
capillary action (thin, narrow tubes allow water to be transported to taller
locations)
Risks to xylem conduits? - CORRECT ANSWERS-air
freezing
dehydration
Function of phloem - CORRECT ANSWERS-transports carbohydrates to non-
photosynthetic portions of a plant for growth and respiration
phloem anatomy - CORRECT ANSWERS-sieve element
companion cell
, plasmodesmata
sieve plate
What are the two main structures on the surface of a leaf? - CORRECT
ANSWERS-cuticle
stomata
The cuticle and stomata help in regulating CO2 ______ and water ______. (gain
or loss) - CORRECT ANSWERS-gain, loss
What are the 3 functions of a leaf? - CORRECT ANSWERS-gas exchange
photosynthesis
transpiration
Why does CO2 uptake in leaves depend of the plants water supply? -
CORRECT ANSWERS-gradients
What is the purpose of columnar arrangement near the upper surface of a
leaf? - CORRECT ANSWERS-maximized light interception
What is the purpose of mesophyll cells? - CORRECT ANSWERS-spread CO2
throughout the leaf
How do guard cells work? - CORRECT ANSWERS-when water escapes the
cells, they shrink, causing the stomata to open. once the cell fills with water,
it will swell, causing the stomata too close.
Why would a leaf need to control the opening to the leaf tissue? - CORRECT
ANSWERS-minimize water loss
What is CAM photosynthesis? - CORRECT ANSWERS-Stomata open at night to
collect CO2, it is stored for photosynthesis usage during the day.
What plants use CAM photosynthesis? - CORRECT ANSWERS-plants that are
adapted to humid/tropical environments (cacti, pineapple)
Why do some plants use CAM photosynthesis? - CORRECT ANSWERS-to
minimize photorespiration
Drawback of using CAM photosynthesis? - CORRECT ANSWERS-more energy
usage
What is the main difference between C4 PSN and CAM PSN? - CORRECT
ANSWERS-
