Use the above graph to assist you in answering questions 1-12. The graph shows t
ID: 237088 • Letter: U
Question
Use the above graph to assist you in answering questions 1-12. The graph shows the relationships between air vapor pressure, air temperature, and relative humidity. Relative humidity on the graph is abbreviated ‘hr’ and shown as a proportion, rather than a percentage; a proportion of 1.0 equals 100% relative humidity, a proportion of 0.5 equals 50%.
Consider a leaf that closes its stomates in the afternoon because of water stress. Closing its stomates would cause leaf temperature to _________, because this would _____.
rise, lower He (lower the cooling afforded by vaporization)
rise, lower Hcv (lower the convective heat loss to the surrounding air)
rise, lower Hcd (lower conductive heat loss to its surroundings)
drop, increase He (increase the cooling afforded by vaporization)
drop, increase Hcv (increase convective heat loss to the surrounding air)
drop, lower Hr (lower the solar radiation absorbed by the leaf)
a.rise, lower He (lower the cooling afforded by vaporization)
b.rise, lower Hcv (lower the convective heat loss to the surrounding air)
c.rise, lower Hcd (lower conductive heat loss to its surroundings)
d.drop, increase He (increase the cooling afforded by vaporization)
e.drop, increase Hcv (increase convective heat loss to the surrounding air)
f.drop, lower Hr (lower the solar radiation absorbed by the leaf)
Explanation / Answer
D) closing its stomates would cause leaf temperture to drop,Because this would increase Hcv (increase convective heat loss to the surrounding air)
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