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Multiple Choice Quiz
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1

Vascular tissue is made of xylem, which conducts water, and phloem, which conducts nutrients.
A)true
B)false
2

Sclerenchyma cells do not contain cytoplasm when mature.
A)true
B)false
3

Of all the water taken in by plants _________ % is lost by transpiration.
A)10
B)25
C)50
D)75
E)90
4

Transpiration is regulated by
A)the number of hours of daylight in the day.
B)opening and closing of stomata.
C)the ability of water molecules to adhere to plant tissue.
D)the thickness of the cuticle.
E)none of the above
5

Which of the following cell types has no living cytoplasm at maturity?
A)tracheids
B)sieve-tube members
C)companion cells
D)collenchyma
E)meristems
6

Which of the following cell types lacks nuclei at maturity?
A)tracheids
B)sieve-tube members
C)companion cells
D)collenchyma
E)meristems
7

Which of the following cell types retains the ability to differentiate into another cell type if the need should arise in a plant?
A)tracheids
B)sieve-tube members
C)companion cells
D)collenchyma
E)meristems
8

Pits allow water to move through
A)vessel elements.
B)tracheids.
C)companion cells.
D)sieve-tube members.
E)both a and d
9

Leaf growth is due primarily to __________ meristems.
A)apical
B)marginal
C)lateral
D)vertical
E)horizontal
10

Large intercellular spaces in which gas exchanges occur between
A)meristems.
B)stipules.
C)spongy parenchyma.
D)ground tissue.
E)cortex.
11

Periderm is
A)cork cells.
B)a dense layer of parenchyma
C)the cork cambium.
D)all of the above
E)none of the above
12

While collecting firewood to heat their mountain cabin, a family finds a dead juniper tree that has fallen over. After cutting the trunk into lengths, they notice the annual rings and count them. There are 34 rings. This means that the tree is
A)34 years old.
B)approximately 34 years old.
C)340 years old.
D)17 years old.
E)The growth rings do not really reflect the age of the tree.
13

A plant with damaged root hairs would
A)be unable to absorb water.
B)be unable to absorb minerals.
C)rely on the root for water absorption.
D)both a and b
E)both b and c
14

Tensile strength can be increased by
A)increasing the diameter of the tube of water.
B)decreasing the diameter of the tube of water.
C)adding an emulsifier to the water.
D)increasing the temperature of the water.
E)decreasing the temperature of the water.
15

While preparing for a dinner party at your house, you cut up some celery to eat with dip. You get busy and forget to put the celery in the refrigerator for awhile and it becomes slightly soft. You place the celery in the refrigerator in some water and an hour later it is once again crispy. Why?
A)The turgor pressure has been restored.
B)The cold temperature made the celery crispy.
C)Water has adhered to the celery, making it crispy.
D)The cold temperature has activated enzymes that play a role in rigidity.
E)none of the above





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