Guard cells are often associated with ____, special epidermal cells that provide a reservoir of water and ions
a. companion cells
b. cuticle cells
c. cork cells
d. sclerenchyma cells
e. subsidiary cells
e
You might also like to view...
Diploid cells contain how many sets of chromosomes?
a. 1 b. 2 c. 3 d. 4
Which factor is the most important algal contribution
to the fungal component of a lichen? a. improved water conservation b. mechanical protection c. photosynthetically derived food d. conversion of nitrogen gas to nitrates e. pigment for camouflage
In the human heart, ____.
A. ventricle walls are more thickly muscled than the atrial wall. B. atrial contraction helps to drive blood circulation throughout the body. C. the right ventricle has thicker walls than the left ventricle. D. the left ventricle pumps blood to the lungs. E. the atrial walls are as thick as the ventricle walls.
Which of the following choices best describes the relationship that exists between moisture and air temperature?
A. The moisture-holding capacity of air decreases as the higher altitude winds of the polar regions descend onto the continents. B. The moisture-holding capacity of air decreases when it is warm and increases when it is cool. C. The moisture-holding capacity of air remains the same (warm or cool) and is not related to its temperature. D. The moisture-holding capacity of air increases when it is warm and decreases when it is cool.