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This activity contains 45 questions.

Question 1
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Mineral nutrients _____.
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Question 2
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A root hair is _____.
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Question 3
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The cytoplasmic continuum connecting neighboring cells is the _____ route of water and solute transport from root hairs to xylem.
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Question 4
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Cells whose function it is to regulate the flow of water into the vascular tissue of a plant are _____.
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Question 5
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The continuum of spaces between cell walls of neighboring cells is the _____ route of water and solute transport from root hairs to xylem.
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Question 6
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A botanist discovered a mutant plant that is unable to produce the material that forms the Casparian strip. This plant is _____.
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Question 7
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The Casparian strip is _____.
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Question 8
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An undergraduate student had a terrarium on her windowsill containing various houseplants. She wondered why the glass was often fogged with water droplets. The undergraduate's friend, a graduate student who had taken a biology class, tried to explain that it was because of _____.
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Question 9
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Root pressure is attributable to _____.
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Question 10
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Which of the following describes the loss of water through the stomata in a plant's leaves?
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Question 11
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The rate of transpiration is expected to be greatest on a _____ day.
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Question 12
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What is the main source of energy that moves water upward in the trunk of a tree?
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Question 13
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What keeps the force of gravity from overcoming transpirational pull?
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Question 14
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Normally when an aphid feeds by puncturing plant tissues, it does not have to suck the sap out. An inexperienced aphid, however, accidentally inserted its feeding tube in the wrong place and found the fluid in its gut being sucked out through the feeding tube. This aphid must have punctured _____.
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Question 15
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During winter, tree sap can sometimes freeze and "cavitation" (the formation of an air pocket) may occur. Which of the following mechanisms of sap transport would you expect to be most immediately affected by cavitation?
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Question 16
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A student is performing a chemical analysis of xylem sap. This student should not expect to find much _____.
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Question 17
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Guard cells _____.
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Question 18
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Which of the following would trigger the opening of stomata in plants living in temperate climates?
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Question 19
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Stomata open during the day in response to _____.
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Question 20
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As turgor pressure increases in guard cells, the transpiration rate would be expected to _____.
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Question 21
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What contributes directly to the turgor of guard cells?
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Question 22
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In general, stomata are _____ during the day and _____ at night.
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Question 23
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Stomata can be opened or closed by guard cells. Closing the stomata at night _____.
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Question 24
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In an apple tree that is producing sugars, sugar might flow from _____ to _____.
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Question 25
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Which aspect of solute transport in the xylem of a plant is most like that of solute transport in the phloem?
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Question 26
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When referring to phloem transport, the "sink" in roots is created by _____.
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Question 27
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A _____ is a sugar source.
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Question 28
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Which of the following substances does the plant obtain from the air?
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Question 29
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When you add "plant food" to your potted geraniums, you are actually providing the plant with _____.
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Question 30
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Terrestrial plants obtain _____ from the atmosphere.
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Question 31
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Professor Scheinman claims to have discovered a new macronutrient required for plant growth. Most of the professor's colleagues are skeptical of this claim. Why might they consider it unlikely?
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Question 32
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Soil could be deficient in any of the following nutrients. If you had to supply one of them, which would be needed in the smallest amount?
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Question 33
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If a plant's leaves are yellowing, it may be that the plant is deficient in the elements needed to make chlorophyll, which include _____.
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Question 34
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Fertilizers are usually enriched in _____.
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Question 35
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Soil can easily become deficient in _____, because these ions are negatively charged and do not stick to negatively charged soil particles.
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Question 36
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A major long-term problem that occurs when irrigation water is flooded onto a field is the _____.
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Question 37
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Organic farming means that _____.
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Question 38
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One of the major problems encountered when growing genetically modified (GM) crops is _____.
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Question 39
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The most abundant gas in our atmosphere cannot be used by plants directly in its atmospheric form and is, therefore, captured by certain bacteria that live symbiotically in their roots. What is this gas?
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Question 40
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Nitrogen fixation is _____.
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Question 41
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Mycorrhizae are _____.
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Question 42
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Legumes (members of the pea family) have roots with swellings called nodules that _____.
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Question 43
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The location on a root that houses nitrogen-fixing bacteria is called _____.
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Question 44
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By trapping insects, carnivorous plants obtain _____, which they need _____.
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Question 45
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The sundew plant has to digest insects because _____.
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