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Biology: Science for Life with Physiology

Colleen Belk, Virginia Borden Maier

Chapter 25

Growing a Green Thumb - all with Video Answers

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Chapter Questions

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Problem 1

Why does a column of water in a xylem tube remain intact despite being under tremendous tension?

Marisa A
Marisa A
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Problem 2

How do the $C_{4}$ and CAM adaptations to photosynthesis reduce water loss from plants?

Marisa A
Marisa A
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01:34

Problem 3

Why is it not advisable to keep bananas in the fridge, especially not with other fruit and vegetables?

Anand Jangid
Anand Jangid
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01:12

Problem 4

Water moves up a plant's stem as a result of
A. the xylem pump; B. diffusion of water into roots; C. translocation of phloem sap; D. evaporation of water from the leaves; E. photosynthesis in xylem cells.

Anand Jangid
Anand Jangid
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Problem 5

When water is under extremely high tension in a xylem tube,
A. transpiration slows; B. water cannot be removed from the soil; C. the water column can "break," blocking further water flow; D. stomata open wide to permit greater water absorption; E. the plant is not photosynthesizing.

Marisa A
Marisa A
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Problem 6

Which of the following adaptations provide an advantage to plants in warm, moist environments?
A. closing stomata in response to decreased water availability; B. large-diameter xylem vessels, permitting rapid water uptake; C. deciduousness, reducing water loss during dry periods; D. small leaf size, reducing sun exposure; E. vertically oriented photosynthetic stems, shading the stomata

Marisa A
Marisa A
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01:11

Problem 7

Which of the following is true for biennial plants?
A. They produce leaves and store nutrients in their first year and flowers in their second year; B. They flower in their first year and store nutrients for their offspring in their second year; C. They produce leaves and flowers in both years.

Anand Jangid
Anand Jangid
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Problem 8

Each of the following pairs represents a likely sugar source and its sink except
A. an apple seed and the fruit in which it is contained; B. mature leaves of a tomato plant and a developing tomato; C. newly emerged leaves on a bean seedling and the seedling's developing roots; D. a sugar beet root in spring and its developing flower stalk; E. the roots of an oak tree and its leaf buds in spring.

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Marisa A
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Problem 9

What types of tropisms can plants display?
A. magnetotropism (the plant grows directionally in a magnetic field); B. phototropism (the plants grows towards a source of light); C. gravitropism (the plant grows against gravity); D. thigmotropism (directed by physical contact); E. B, C, and D.

Marisa A
Marisa A
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00:50

Problem 10

Plant hormones are unlike animal hormones because
A. they are produced only in small amounts; B. they have different effects on different organs; C. they are not produced in specialized glands; D. they are mobile and can move throughout the plant body; E. interactions among different plant hormones can determine their ultimate effect on an organ.

Jonathan Temple
Jonathan Temple
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