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Biology > Chapter 4 > Flashcards

Chapter 4 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

What are the principal parts of a green plant?

A

the leaves, the stems, and the roots

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2
Q

What part of the plant manufacture most of the plant’s food?

A

the leaves

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3
Q

What part of the plant support the leaves?

A

the stem

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4
Q

What part of the plant are designed to absorb necessary nutrients from the soil and anchor the plant to the soil?

A

roots

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5
Q

What are the parts of the stem that allow is to grow in length or to develop new stems, flowers, or leaves?

A

bud

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6
Q

What covers each bud and protect the bud in winter?

A

bud scales

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6
Q

What type of bud allows the stem to grow in length?

A

terminal bud

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6
Q

What reveal where leaves were attached to the stem in previous years?

A

leaf scars

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6
Q

What type of buds grow in the space formed between the lead petiole and the stem and allow growth of new stems from the sides of the main stem?

A

lateral buds

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7
Q

What are rings that circle the stem and indicate where last year’s growth started?

A

bud-scale scars

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7
Q

What is the section of the twig between nodes?

A

internode

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8
Q

What are opening that allow air to enter the stem?

A

lenticels

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8
Q

What are areas where leaves are growing or have grown?

A

nodes

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9
Q

What type of growth is growht in lenght?

A

primary growth

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10
Q

What type of growth is growth in width?

A

secondary growth

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11
Q

What type of branching is characterized by trees with strong terminal buds on the main vertical stem that grow tall and straight with branches coming from a large central shaft?

A

spire-like branching

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11
Q

What are the three areas of a woody dicot stem?

A

the bark, the wood, and the pith

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12
Q

What type of branching is characterized by several main branches that are usually rather close to the ground?

A

spreading branching

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13
Q

What is the wood that carries water and minerals upward from the roots to the leaves?

A

xylem

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13
Q

What is the innermost layer of the bark that carries sugars and other foods made in the leaves downward to the growing parts of the stem and roots?

A

phloem

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14
Q

What is the outer section of a woody stem that transport food throughout the plant?

A

bark

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14
Q

What is a layer of meristematic tissue that is responsible for the secondary growth of woody stems?

A

vascular cambium

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14
Q

What is the soft tissue at the center of young stems?

A

pith

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15
Q

What stiffens thick cellulose walls?

A

lignin

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15
Q

What is the strong, resilient, inner section of a woody stem that provides strength and support for the stem and helps transport water and minerals from the roots to the leaves?

A

wood

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15
Q

What is the outermost layer of the bark?

A

epidermis

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15
Q

What is a simple system of warter-conducting cells?

A

tracheid

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16
Q

What replaces the epidermis of the bark as the tree grows older?

A

cork

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16
Q

What are the cells that lie between the bark and the wood that produces new phloem cells?

A

vascular cambium

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17
Q

What is the younger, functioning xylem that is usually lighter in color?

A

sapwood

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17
Q

What is the older inner wood that is useful only as support for the stem and is usually a darker color than the rest of the wood?

A

heartwood

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17
Q

What type of cells are packed loosely together and function mostly as water storage cells?

A

pith cells

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17
Q

What are the light and dark streaks in wood that are formed by differences in the size of springwood and summerwood vessels?

A

grain

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18
Q

What is the center of a woody stem in a young plant?

A

pith

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19
Q

What is a type of xylem tube that are longer than a tracheid?

A

vessels

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20
Q

What type of wood in annual growth rings is light in color because xylem vessels are large to conduct the large amount of water necessary for spring growth?

A

springwood

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20
Q

What are distinct layers of xylem that are a result of periods of faster and slower growth?

A

annual growth rings

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20
Q

What type of wood found in annual growth rings is darker in color because the xylem vessels are smaller?

A

summerwood

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21
Q

How are herbaceous stems different from woody stems?

A

they have soft tissues; they generally live for only one growing season; they do not experience secondary growth; and they are typically smaller than wood plants

22
Q

What are bundles of xylem and phloem cells found in herbaceous stems?

A

vascular bundles

23
Q

What is the center of the stem in a herbaceous plant?

A

pith

24
Q

What vascular cells in a herbaceous stem that are found toward the center of the stem?

A

xylem

25
Q

What are the vascular cells in a herbaceous stem that are found toward the outside of the stem?

A

phloem

26
Q

What is the tissue in which the vascular bundles are embedded?

A

cortex

27
Q

What is the outer layer or a herbaceous stem that protects the delicate tissues?

A

epidermis

28
Q

How are the vascular bundles arranged in herbaceous dicots? Herbaceous monocots?

A

in rings; scattered throughout the stem

29
Q

What is the outer covering of a monocot stem?

A

rind

30
Q

What is located in the rind and makes it hard and strong to support the plant?

A

silica

31
Q

What is it called when a new plant starts to grow from a stem, leaf, or root?

A

vegetative reproduction

32
Q

What type of reproduction occurs when some part other than the seed grown into a new plant?

A

asexual reproduction

33
Q

What is the process of deliberately using vegetative reproduction to start a new plant?

A

vegetative propagation

34
Q

What is a piece of stem or root that can grow into a new plant?

A

cutting

35
Q

What are two advantages of using cuttings?

A

it is certain that the new plant will be identical to the plant from which the cutting was taken, and they save much more time compared to the time it would take to grow that plant from a seed

36
Q

What are roots that grow from an unexpected region of a plant, such as from a stem or leaf?

A

adventitious roots

37
Q

What is the method of vegetative propagation that involves causing an existing plant to generate adventitious roots at a node?

A

layering

38
Q

What is the process of transplanting living tissue from one plant to another?

A

grafting

39
Q

When grafting, what is the tree that receives the new stem?

A

stock

39
Q

What is a kind of grafting in which the scion is a bud?

A

budding

39
Q

What type of tropism occurs when a plant grows toward chemicals?

A

chemotropism

40
Q

When grafting, what is the branch which is going to be grafted onto a stem growing on another tree?

A

scion

40
Q

What type of tropism occurs when a plant responds to gravity?

A

geotropism

40
Q

What type of tropism occurs when a plant grows towar light?

A

phototropism

41
Q

What is the simplest response to a stimulus that occurs when an organism either turns toward or away from a stimulus?

A

toropism

42
Q

What is the first plant hormone to be discovered that causes the stem or shoot of the plant to grow faster on one side than the other?

A

auxins

42
Q

What are chemical messengers that regulate many aspects of plant growth?

A

hormones

43
Q

What is the plant hormone that stimulates lateral buds to grow into new shoots?

A

cytokins

43
Q

What is the plant hormon that triggers germinatin?

A

gibberellins

43
Q

What type of tropism occurs when a plant grows toward water?

A

hydrotropism

43
Q

What type of tropism occurs when a plant grows toward touch?

A

thigmatropism

44
Q

What is the plant hormone that signals plant tissues to remain dormant?

A

abscisic acid

45
Q

What is the plant hormone that signals leaf abscission?

A

ethylene

46
Q

What allows seedlings to be produced from individual plant cells grown in the laboratory?

A

tissue culturing

47
Q

What is a special stem and leaves designed to store food?

A

bulb

48
Q

What is a swollen stem that stores food underground and has a thinker stem and thinner leaves than a bulb?

A

corms

49
Q

What is a thick stem that grows horizontally underground to provide food storage and cause vegetative reproduction?

A

rhizome

50
Q

What are special stems that grow quickly along the surface of the ground?

A

stolons

51
Q

What are special stems that have a habit of climbing?

A

tendrils

52
Q

What is a bud-containing special stem that grows underground and stores food?

A

tuber

53
Q

What are long, sharp special stems that provide protection to a plant?

A

thorns

54
Q

What is the root system in which the primary root grown straight down and remains larger than the secondary roots that branch off from it penetrating the soil with relatively little branching?

A

taproot system

55
Q

What type of root system has no main section but spreads out with very thin roots, forming a tangled mess in shallow soil?

A

fibrous root system

56
Q

What is a protective layer that covers the outer part of a root?

A

epidermis

57
Q

What are finger-like projections of epidermal cells that increase the water-absorbing surface area of a plant root?

A

root hairs

58
Q

What is the root’s food-storage region inside the epidermis?

A

root cortex

59
Q

What is surrounded by the root cortex and contains xylem and phloem tissues?

A

central vascular cylinder

60
Q

What is responsible for forming the epidermis, cortex, and the vascular cylinder?

A

apical meristem

61
Q

What is the region that causes cells to increase in length?

A

region of elongation

61
Q

What is the region closest to the end where cell division takes place?

A

merestimatic region

62
Q

What is the region in which cells organize in the vascular cylinder?

A

matuation region

63
Q

What is at the tip of a root and provides a covering for the delicate young root?

A

root cap

63
Q

What are roots that originate from the primary root and have the same structural characteristics?

A

lateral roots

63
Q

What is the process of mixing molecules of one substance through another by random molecular motion?

A

diffusion

64
Q

What is a thin covering of a cell?

A

membrane

65
Q

What is one-way diffusion through a semi-permeable membrane?

A

osmosis

66
Q

What is the upward flow of absorbed minerals though the xylem tubes?

A

sap stream

67
Q

What is the upward movement of liquids through a very narrow tube?

A

capillarity

68
Q

What is the chief force that draws water up the stem?

A

transpiration pull

Biology (6 decks)

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