Ch 35 Flashcards

1) Which part of a plant absorbs most of the water and minerals taken up from the soil?

A) root cap
B) root hairs
C) the thick parts of the roots near the base of the stem

D) storage roots

2) Prop roots are the modified aerial adventitious roots of corn that ________.

A) enable the root system to obtain oxygen
B) support tall, top-heavy plants
C) enable the root system to anchor

D) wrap around other plants to support tall, top-heavy plants

3) Strawberries have modified horizontal shoots growing along the surface, which are referred to as ________.
A) rhizomes
B) tubers

C) stolons
D) rhizoids

4) An axillary bud in the stem can potentially form a ________ in a variety of plants based on evolutionary adaptations.
A) lateral branch
B) thorn

C) flower
D) lateral branch, thorn, and flower

5) Onion leaves have been modified for the purpose of ________. A) defense (protect from predators)
B) storage
C) support

D) reproduction

6) ________ is a relatively indigestible strengthening polymer that accounts for more than a quarter of the dry mass of wood.
A) Cellulose
B) Starch

C) Lignin
D) None of these choices

7) When you eat Brussels sprouts, you are eating ________.

A) immature flowers
B) large axillary buds
C) petioles

D) storage leaves

8) Some of the largest leaves in the world can be found on plants near the floor of dense tropical rain forests. Which of the following precursors for photosynthesis is most likely limited in these large leaves?
A) oxygen

B) carbon dioxide
C) glucose
D) light

9) Leaf thickness represents a trade-off between ________.

A) light collection and carbon dioxide absorption
B) water retention and carbon dioxide absorption
C) water retention and oxygen absorption

D) light collection and oxygen absorption

10) One important difference between the anatomy of roots and the anatomy of leaves is that ________.
A) only leaves have phloem and only roots have xylem
B) root cells have cell walls and leaf cells do not

C) a waxy cuticle covers leaves but is absent from roots
D) vascular tissue is found in roots but is absent from leaves E) leaves have epidermal tissue but roots do not

11) Which structure is correctly paired with its tissue system?

A) root hair—vascular tissue
B) guard cell—vascular tissue
C) companion cell—ground tissue

D) tracheid—vascular tissue

12) The vascular bundle in the shape of a single central cylinder in a root is called the ________.

A) cortex
B) stele
C) periderm

D) pith

13) Which of the following cell types retains the ability to undergo cell division?

A) a parenchyma cell near the root tip
B) a functional sieve tube element
C) a tracheid

D) a stem fiber

14) Which of the following have unevenly thickened primary walls that support young, growing parts of the plant?
A) parenchyma cells
B) collenchyma cells

C) sclerenchyma cells
D) tracheids and vessel elements

15) Which of the following is correctly paired with its structure and function?

A) sclerenchyma—supporting cells with thick secondary walls
B) ground meristem—protective coat of woody stems and roots
C) guard cells—waterproof ring of cells surrounding the central stele in roots

D) periderm—parenchyma cells functioning in photosynthesis in leaves

16) Which of the following are water-conducting cells that are dead at functional maturity?

A) parenchyma cells
B) collenchyma cells
C) tracheids and vessel elements

D) sieve-tube elements

17) Which of the following cells transport sugars over long distances?

A) parenchyma cells
B) sclerenchyma cells
C) tracheids and vessel elements

D) sieve-tube elements

18) Which of the following plants are annuals?

A) azaleas
B) roses
C) blueberries

D) wheat

19) Plant meristematic cells ________.
A) are distributed evenly in all tissues throughout the plant
B) are undifferentiated cells that produce new cells
C) increase the surface area of dermal tissue by developing root hairs
D) subdivide into three distinct cell types named parenchyma, ground meristem, and procambium

20) Which of the following arise, directly or indirectly, from meristematic activity?

A) secondary xylem
B) leaves
C) dermal tissue

D) secondary xylem, leaves, dermal tissue, and tubers

21) Compared to most animals, the growth of most plant structure is best described as ________.

A) perennial
B) weedy
C) indeterminate

D) primary

22) What is present in a shoot apical meristem region?

I) the region of cell division
II) immature buds and leaves
III) cells that will give rise to the protoderm, ground meristem, and procambium

A) only I
B) only II
C) only III
D) I, II, and III

23) Shoot elongation in a growing bud is due primarily to ________.

A) cell division at the shoot apical meristem
B) cell elongation directly below the shoot apical meristem
C) cell elongation localized in each internode

D) cell division at the shoot apical meristem and cell elongation directly below the shoot apical meristem

24) Apical meristems of dicots are at the tips of stems. Apical meristems of grasses are at ground level or slightly below, concealed by the leaves. What does this mean when considering care of a lawn or soccer field?
A) If you mow right at ground level, the leaves can keep growing with no problem.

B) Grass mowed two inches above ground level grows at a slower rate compared to grass mowed three inches above the ground level.
C) If you mow two inches above ground level, most apical meristems will be cut down.
D) If you mow two inches above ground level, the apical meristem can keep producing new cells.

25) In a meristematic region, the cell plate during mitosis is perpendicular to the side of the stem. In what direction will the stem grow?
A) laterally in width
B) vertically in height

C) at a 45-degree angle from the ground

D) away from the sun

26) Which of the following cells or tissues arise from lateral meristem activity?

A) secondary xylem
B) leaves
C) trichomes

D) tubers

27) Cells produced by lateral meristems are known as ________. A) dermal and ground tissue
B) lateral tissues
C) pith

D) secondary tissues

28) Which of the following can be used to determine a twig's age?

A) number of apical bud scar rings
B) number of leaf scars
C) number and arrangement of axillary buds

D) length of internodes

29) A plant that grows one year, dies back, and then grows again the following year, produces flowers, and then dies would be considered ________.
A) annual
B) biennial

C) perennial
D) not very fit

30) Which of the following is the correct sequence of the zones in the primary growth of a root, moving from the root cap inward?
A) zone of cell division, zone of elongation, zone of differentiation
B) zone of differentiation, zone of elongation, zone of cell division

C) zone of elongation, zone of cell division, zone of differentiation

D) zone of cell division, zone of differentiation, zone of elongation

31) The driving force that pushes the root tip through the soil is primarily ________.

A) continuous cell division in the root cap at the tip of the root
B) continuous cell division just behind the root cap in the center of the apical meristem

C) elongation of cells behind the root apical meristem

D) continuous cell division of root cap cells

32) Mitotic activity by the apical meristem of a root makes which of the following more possible?
A) increased delivery of water to the aboveground stem
B) decreased absorption of mineral nutrients

C) increased absorption of carbon dioxide.

D) effective lateral growth of the stem

33) Which of the following root tissues gives rise to lateral roots? A) endodermis
B) phloem
C) epidermis

D) pericycle

34) As a youngster, you drive a nail in the trunk of a young tree that is 3 meters tall. The nail is about 1.5 meters from the ground. Fifteen years later, you return and discover that the tree has grown to a height of 30 meters. About how many meters above the ground is the nail?
A) 0.5

B) 1.5
C) 3.0
D) 15.0

35) You find a plant unfamiliar to you and observe that it has vascular bundles scattered throughout the stem cross section. What do you conclude about the plant?
A) It is probably an herbaceous eudicot.
B) It will probably get annual rings of wood.

C) It is probably a monocot.
D) It could be either a young eudicot or a monocot.

36) Monocot vascular bundles do not have a vascular cambium between the xylem and phloem. This means that monocots ________.
A) are much less efficient at conducting water and sugars
B) have very thin stems

C) do not produce wood in annual rings
D) cannot produce lateral shoots

40) A student examining leaf cross sections under a microscope finds many loosely packed cells with relatively thin cell walls. The cells have numerous chloroplasts. What type of cells are they? A) parenchyma
B) endodermis

C) collenchyma
D) sclerenchyma

41) The veins of leaves are ________.

I) composed of xylem and phloem
II) continuous, with vascular bundles in the stem and roots
III) finely branched to be in close contact with photosynthesizing cells

A) only I
B) only II
C) only III
D) I, II, and III

44) Increasing the number of stomata per unit surface area of a leaf when atmospheric carbon dioxide levels decline is most analogous to a human ________.
A) breathing faster as atmospheric carbon dioxide levels increase
B) putting more red blood cells into circulation when atmospheric oxygen levels decline

C) removing red blood cells from circulation when atmospheric oxygen levels increase

D) increasing the volume of its lungs when atmospheric carbon dioxide levels increase

45) A lateral root originates in the ________.

A) pericycle
B) cortex
C) endodermis

D) epidermis

46) Of the following plants, which stem has scattered vascular bundles?

A) corn
B) magnolia
C) chrysanthemum

D) hibiscus

47) The secondary mesophyll of leaves is made up of ________. A) parenchyma tissue
B) collenchyma tissue
C) sclerenchyma tissue

D) parenchyma and collenchyma tissues

48) Where is primary growth occurring in an old tree?
A) closest to ground level at the base of the tree
B) in young branches where leaves are forming
C) where the vascular cambium and cork cambium are located
D) Nowhere; trees more than a year old have only secondary growth.

49) What tissue makes up most of the wood of a tree?

A) primary xylem
B) secondary xylem
C) secondary phloem

D) vascular cambium

50) A plant has the following characteristics: a taproot system, several growth rings evident in a cross section of the stem, and a layer of bark around the outside. Which of the following best describes the plant?
A) herbaceous eudicot

B) woody eudicot
C) woody monocot
D) herbaceous monocot

51) If you were able to walk into an opening cut into the center of a large redwood tree, when you exited from the middle of the trunk (stem) outward, you would cross, in order, ________.

A) the annual rings, new xylem, vascular cambium, phloem, and bark
B) the secondary xylem, cork cambium, phloem, and periderm

C) the vascular cambium, oldest xylem, and newest xylem
D) the secondary xylem, secondary phloem, and vascular cambium

52) Heartwood and sapwood consist of ________.

A) periderm
B) secondary xylem
C) secondary phloem

D) cork

53) Additional vascular tissue produced as secondary growth in a root originates from which cells?
A) vascular cambium
B) apical meristem

C) endodermis
D) xylem

54) The bark of a tree trunk is made up of ________.

A) heart wood and sap wood
B) heart wood
C) secondary phloem

D) secondary phloem and layers of periderm

55) The polarity of a plant is established when ________.

A) cotyledons form at the shoot end of the embryo
B) the shoot-root axis is established in the embryo
C) the primary root breaks through the seed coat

D) the shoot first breaks through the soil into the light as the seed germinates

56) Growth and development of plant parts involves ________.

I) cell division to produce new cells

II) enlargement and elongation of cells

III) specialization of cells into tissues

A) only I
B) only II
C) only III
D) I, II, and III

57) Totipotency is a term used to describe a cell's ability to give rise to a complete new organism. In plants, this means that ________.
A) plant development is not under genetic control
B) the cells of shoots and the cells of roots have different genes

C) cell differentiation depends largely on the control of gene expression

D) a cell's environment has no effect on its differentiation

58) The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by ________.
A) a change in the morphology of the leaves produced
B) the initiation of secondary growth

C) a change in the orientation of preprophase bands and cytoplasmic microtubules in lateral meristems
D) the activation of floral meristem identity genes

1) Most of the growth of a plant body is the result of

A) cell differentiation.
B) morphogenesis.
C) cell division.

D) cell elongation.

2) The innermost layer of the root cortex is the

A) core.
B) pericycle.
C) endodermis.

D) pith.

3) Heartwood and sapwood consist of

A) bark.
B) periderm.
C) secondary xylem.

D) secondary phloem.

4) The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by
A) a change in the morphology of the leaves produced.
B) the initiation of secondary growth.

C) the formation of lateral roots.
D) the activation of floral meristem identity genes.

5) Suppose a flower had normal expression of genes A and C and expression of gene B in all four whorls. Based on the ABC hypothesis, what would be the structure of that flower, starting at the outermost whorl?
A) carpel-petal-petal-carpel

B) petal-petal-stamen-stamen

C) sepal-carpel-carpel-sepal

D) sepal-sepal-carpel-carpel

6) Which of the following arise(s), directly or indirectly, from meristematic activity?

A) secondary xylem
B) leaves
C) dermal tissue

D) all of the above

7) Which of the following would not be seen in a cross section through the woody part of a root?

A) sclerenchyma cells
B) parenchyma cells
C) sieve-tube elements

D) root hairs