Chapter 6

Question 1

stress

Answer 1

Harsh environmental conditions, where lack of
resources and/or extreme temperatures limit growth

Question 2

T/F: A relief of such “stressful”
conditions may lead to a
disadvantage for the
species, and even extinction,
when species that are less
stress-tolerant become
more competitive

Answer 2

true

Question 3

photosynthesis

Answer 3

Synthesis of carbohydrates from
CO2 by green plants using
sunlight

Question 4

transpiration

Answer 4

loss of water vapour from plant, mostly via stomata

Question 5

Evaporation

Answer 5

loss of water vapour, usually from soil surface

Question 6

Evapotranspiration

Answer 6

combination of evaporation and transpiration

Question 7

Respiration

Answer 7

Using organic matter as a source
for energy (ATP) by all organisms,
mostly upon release of CO2

Question 8

T/F: Photosynthesizing plants face an important ecological
dilemma: Uptake of CO2 is associated with loss of water

Answer 8

True

Question 9

T/F: Succulence (storage of water) also is an adapation
to drought by itself: in stems, leaves or roots.
Often associated with CAM photosynthesis

Answer 9

True

Question 10

T/F: Deep roots are adaptations to drought

Answer 10

True