CSU F311 EXAM 1 2025 QUESTIONS
AND ANSWERS
1. In general, trees lose the most water while: A.splitting CO2 molecules during
photosynthesis.
B.keeping cells hydrated.
C.transporting nutrients into roots.
D.taking up CO2 through their stomata. - ....ANSWER ...-D. taking up CO2
through their stomata (transpiration!)
2. How does water move up the stem of a tree?
A. There is a gradient in water potential, from very low potential in the soil to very
high potential in the air; water moves from low to high potential.
B. There is a gradient in water potential, from very high potential in the soil to very
low potential in the air; water moves from high to low potential.
C. Because CO2evaporates out of the leaf, taking water molecules with them.
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, D. None of the above. - ....ANSWER ...-B. There is a gradient in water
potential, from very high potential in the soil to very low potential in the air; water
moves from high to low potential.
3. Factors that might decrease water loss from a leaf are:
A.Fine hairs on the leaf surface
B.Larger and more abundant stomata
C.High vapor pressure deficit
D.All of the above - ....ANSWER ...-A. Fine hairs on the leaf surface
4. Adiabatic heating and cooling:
A. Involves taking a mass of air and raising or lowering its pressure.
B. Are responsible for changes in temperature with elevation in Colorado.
C. Are responsible for the rain-shadow effect in precipitation.
D. All of the above. - ....ANSWER ...-D. All of the above
5. Which forest type do you think would result in the greatest increase in steam
water flow following forest thinning?
A.Deciduous forest with snow-dominated precipitation
B.Evergreen forest with snow-dominated precipitation
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
AND ANSWERS
1. In general, trees lose the most water while: A.splitting CO2 molecules during
photosynthesis.
B.keeping cells hydrated.
C.transporting nutrients into roots.
D.taking up CO2 through their stomata. - ....ANSWER ...-D. taking up CO2
through their stomata (transpiration!)
2. How does water move up the stem of a tree?
A. There is a gradient in water potential, from very low potential in the soil to very
high potential in the air; water moves from low to high potential.
B. There is a gradient in water potential, from very high potential in the soil to very
low potential in the air; water moves from high to low potential.
C. Because CO2evaporates out of the leaf, taking water molecules with them.
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, D. None of the above. - ....ANSWER ...-B. There is a gradient in water
potential, from very high potential in the soil to very low potential in the air; water
moves from high to low potential.
3. Factors that might decrease water loss from a leaf are:
A.Fine hairs on the leaf surface
B.Larger and more abundant stomata
C.High vapor pressure deficit
D.All of the above - ....ANSWER ...-A. Fine hairs on the leaf surface
4. Adiabatic heating and cooling:
A. Involves taking a mass of air and raising or lowering its pressure.
B. Are responsible for changes in temperature with elevation in Colorado.
C. Are responsible for the rain-shadow effect in precipitation.
D. All of the above. - ....ANSWER ...-D. All of the above
5. Which forest type do you think would result in the greatest increase in steam
water flow following forest thinning?
A.Deciduous forest with snow-dominated precipitation
B.Evergreen forest with snow-dominated precipitation
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
