Black spot fungus is a disease that is known to attack roses in humid climates. At first, small black spots appear on the leaves. If left untreated, the entire plant can die. From this information, what is mostly the main cause of the demise?    a) The plants’ cells are unable to carry out aerobic respiration. b) The leaves are unable to manufacture enough sugar to maintain the health of the plant. c) The roots are unable to absorb enough water. d) The stems are unable to support the plant.

Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter35: Plant Nutrition
Section35.2: Soil
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Black spot fungus is a disease that is known to attack roses in humid climates. At first, small black spots appear on the leaves. If left untreated, the entire plant can die. From this information, what is mostly the main cause of the demise? 
 
a) The plants’ cells are unable to carry out aerobic respiration.
b) The leaves are unable to manufacture enough sugar to maintain the health of the plant.
c) The roots are unable to absorb enough water.
d) The stems are unable to support the plant.
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