Exam 6 Flashcards

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0
Q

which of the following substances can limmit plant growth in nature

A

all of these

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1
Q

which 2 elemenets make up more than 90% of the dry weight of plants

A

O & C

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2
Q

Humus is

A

organic constituents of soils

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3
Q

in what form do plants take up most soil minerals

A

as ions dissolved in water

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4
Q

which of the following is an example of fixed nitrogen

A

NH2 and NO3

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5
Q

Which of the following most accurately describes carnivorous plants

A

photosynthetic autotrophs

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6
Q

in the nutrition of a plant, which element is classified as a macronutrient

A

carbon

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7
Q

nitrogen fixation is a process that

A

converts ammonia to nitrate

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8
Q

among important crop plants, nitrogen-fixing root nodules are most commonly an attribute of

A

legumes such as peanuts

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9
Q

carnivorous plants have mechansims that trap and digest small animals. the products of this digestion are used to supplement the plant’s supply of

A

minerals

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10
Q

where would you look to find the gametophyte generation of a flowering plant

A

in flower parts

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11
Q

what is a radicle

A

an embryonic root

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12
Q

What are adventitious roots

A

all of these

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13
Q

which is the most accurate description of how plants grow

A

by both the addition of new cells and cell expansion

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14
Q

which of the following terms best describes the distinctive architecture of plants

A

radial symmetry and apical-basal symmetry

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15
Q

alternation of generations in an angiosperm describes the cycle of life stages between

A

gametophyte and sporophyte

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16
Q

which part of a plant absorbs most of the water and mminerals taken up from the soil

A

root hairs

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17
Q

vascular plant tissue includes all of the following cell types except

A

cambiumm cells

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18
Q

pores on the leaf surface that function in gas exchange are called

A

stomata

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19
Q

one important difference between the anatomy of roots and the anatomy of leaves is that

A

a waxy cuticle covers leaves but is absent in roots

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20
Q

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 the tree has grown to a height of 30 meters. the nail is now __ meters above the ground

A

1.5

21
Q

The vascular tissue system of a 3 year old eudicot stem consists of

A

2 rings of xylem and 3 of phloem

22
Q

which function is not shared by both the root system and the shoot system of a plant

A

absorb water

23
Q

which of the following tissues is an embryonic tissue type found at the apex of roots and shoots

A

meristem

24
Q

which type of root is important in eudicot food storage in plants such as carrots and radishes

A

taproot

25
Q

an aquaporin is

A

a protein channel in plasma membranes that faciliatates the diffusion of water

26
Q

by what means can plant accomplish tissue-leve3l transport

A

all of these

27
Q

the evaporation of water from the surface of a plant is a process most accurately referred to as

A

transpiration

28
Q

the energy required to power bulk flow in the xylem is ultimately provided by pressure and gravity

A

false

29
Q

the transport of organic molecules, driven by differences in turgor pressure between a sugar source and a sugar sink, is most accurately referred to as

A

translocation

30
Q

which term describes forcing water out the the plant at the edges of its leaves

A

guttation

31
Q

which force is responsible for moving water the the tops of the tallest trees

A

transpiration

32
Q

which force pushes water into the xylem as osmosis moves water into the root

A

root pressure

33
Q

to secure genuine maple syrup, maples tree trunks are tapped with metal spigots that interrupt the flow of sap in late winter prior to spring budding. which of the following would be true of this process

A

all of these

34
Q

all of the following describe an important component of the long-distance transport process in plants except

A

endodermis Casparian strip

35
Q

in plant roots, the casparian strip is correctly described by which of the following

A

it ensures that all water and dissolved substances must pass through a cell before entering the vascular tissue

36
Q

which of these would be least likely to enter a plant through the roots

A

carbon dioxide

37
Q

arrange the following 5 events in an order that explains the mass flow of materials in the phloem

A

2,4,3,1,5

38
Q

where do the pollen grains of flowers develop

A

in the anthers of the flower

39
Q

where would you find female gametophytes of a flowering plant

A

within ovules in a flower’s ovary

40
Q

how many whorls of organs occur in complete flowers

A

4

41
Q

from what structure does a fruit pericarp primarily develop

A

the ovary wall

42
Q

which of the following is found in eudicot seeds but not in monocot seeds

A

hypocotylis

43
Q

put in order, from innermost to outermost, the flower organs developed from whorls

A

4,2,3,1

44
Q

which of the following is not an adapted form of seed dispersal

A

all of these

45
Q

in monocots, an epcotyl with its first bud enclosed in a protective sheath is known as a __ and the enclosed root is referred to as a

A

coleoptile; coleorhizae

46
Q

some seeds germinate rapidly upon dispersal, while other seeds are capapble of germinating thousands of years later under appropriate conditions

A

true

47
Q

ovules are contained within the

A

ovary

48
Q

pollen would land on the ___ during pollination

A

stigma

49
Q

the function of the endosperm is to

A

provide nutrients to the embryo