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1
The principle water-conducting tissue in vascular plants is __________.
A)phloem.
B)xylem.
C)sieve tubes.
D)mesophyll.
E)cambium.
2
Trichomes on a leaf can perform all the following functions except ________.
A)regulation of heat.
B)regulation of water.
C)capture carbon dioxide.
3
The flattened part of a leaf is its __________.
A)blade.
B)petiole.
C)node.
D)stipule.
E)scale.
4
Plants contain a variety of tissues.
A)True
B)False
5
Mesophyll tissues are found within a
A)stem.
B)leaf.
C)root.
D)branch.
6
Which of the following differentiates into primary phloem and xylem?
A)protoderm.
B)ground meristem.
C)procambium.
D)cortex.
E)root hairs.
7
The function of the Casparian strip is to __________.
A)direct the movement of water through the endodermis of the roots.
B)regulate the rate of transpiration from the leaves.
C)move carbohydrates throughout the plant.
D)protect the root's apical meristem as it grows through the soil.
E)regulate the rate of photosynthesis in the leaves.
8
Which are the least specialized and the most common of all plant cell types?
A)collenchyma
B)cambium
C)sclerenchyma
D)parenchyma
E)phloem
9
In which type of plant are the vascular bundles scattered in the plant stems?
A)monocots
B)dicots
C)both monocots and dicots
D)neither monocots nor dicots
10
Stems grow only at their tips.
A)True
B)False
11
Of all the water taken in by plants _________% is lost by transpiration.
A)10
B)25
C)50
D)75
E)90
12
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
13
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
14
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
15
Pits allow water to move through ___________________.
A)stoma.
B)tracheids.
C)companion cells.
D)sieve-tube members.
E)both a and d
16
Leaf growth is due primarily to __________ meristems.
A)apical
B)marginal
C)lateral
D)vertical
E)horizontal
17
Periderm is composed of ____________________.
A)cork cells.
B)a dense layer of parenchyma
C)the cork cambium.
D)all of the above
E)none of the above
18
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)68 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.
19
How the combination of gravity, tensile strength, and cohesion affects water movements in plants is called the cohesion-adhesion-tension theory.
A)True
B)False
20
_____________ provides the "pull" that raises the water through the plant from the roots.
A)Osmosis
B)Cohesion
C)Adhesion
D)Transpiration





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