Biology, Eighth Edition (Raven)

Chapter 39: Plant Nutrition and Soils

Pre Test

What is necessary for a mineral to be absorbed by roots? (p. 774)
A)They must be positively charged.
B)They must be negatively charged.
C)They must be dissolved in water.
D)Soil particles must have adsorbed them.
E)Fungi must first process them.
Which macronutrient is correctly matched with its function? (p. 777)
A)Phosphorous; binds to ADP to make ATP
B)Sulfur; a major component of most organic molecules
C)Potassium; a component of chlorophyll molecules
D)Magnesium; helps regulate stomatal opening
E)Nitrogen; opens stomata
Carnivorous plants -- plants which metabolize insects -- have adapted to what deficiency in their natural soils? (p. 780)
An increase in oxygen-to-carbon dioxide ratio most immediately results in (p. 782)
A)C4 carbon fixation
C)CAM carbon fixation
D)Production in glucose
E)Increased efficiency in photosynthesis
Which part of plants is most directly exposed to environmental contaminants? (p. 784)
A)The shoot, because it experiences wind currents that carry the toxins toward it.
B)The leaves, because gas exchange through their stomata can filter impurities.
C)The vascular system, because it cycles large amounts of fluids in a short amount of time.
D)The roots, because their endodermis is exposed to all chemicals entering the vasculature.
E)The epidermis of leaves, because they have a very large surface area.
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