8/31

Question 1

what fixes atmospheric nitrogen

Answer 1

rhizobium bacteria

Question 2

where do rhizobium bacteria live

Answer 2

root nodule

Question 3

what are two types of conducting cells

Answer 3

tracheids and vessel elements

Question 4

what does xylem transport

Answer 4

water

Question 5

what does phloem transport

Answer 5

organic materials

Question 6

what are conducting cells

Answer 6

sieve tube memebers

Question 7

what are sieve plates used for

Answer 7

protecting from cell to cell

Question 8

what do plasmodesmara extend through

Answer 8

sieve plates

Question 9

what is the purpose of sieve plates

Answer 9

so there is no water loss

Question 10

what is used for communication

Answer 10

plasmodesmata

Question 11

where are plasmodesmata embedded into

Answer 11

the cytoplasm of each cell

Question 12

what is a growth extender for communication

Answer 12

plasmodesmata

Question 13

water entering roots creates what type of pressure

Answer 13

a positive pressure

Question 14

root pressure pushes xylem sap in which direction

Answer 14

upward

Question 15

what is guttation

Answer 15

the sweating of a plant

Question 16

where is water forced out of

Answer 16

vein endings along the edges of leaves

Question 17

cohesion tension model of xylem transport suggests what

Answer 17

a passive xylem transport

Question 18

what tends to cling together

Answer 18

water molecules

Question 19

what does polarity of water allow

Answer 19

interaction with molecules of vessel walls

Question 20

due to what do water columns move passively

Answer 20

upward to transpiration

Question 21

what type of charge does water have

Answer 21

a slight charge

Question 22

what is polar

Answer 22

water

Question 23

water interacts with what other molecules

Answer 23

other polar molecules

Question 24

what is cohesion tension for

Answer 24

water

Question 25

what is each stomata in leaf epidermis bordered by

Answer 25

guard cells

Question 26

what prevents water loss

Answer 26

waxy cuticle

Question 27

what goes against the gradient

Answer 27

water

Question 28

what do guard cells protect

Answer 28

openings

Question 29

guard cells are flexible. t or f

Answer 29

true

Question 30

what opens the stomata

Answer 30

increased turgor pressure in guard cells

Question 31

why does potassium enter into guard cells

Answer 31

to tell it to open up

Question 32

what transports sugar

Answer 32

the phloem

Question 33

where does sugar accumulate

Answer 33

in the swolen tissue

Question 34

what does the girdling of the tree below the level of leaves cause

Answer 34

bark to swell just above the cut

Question 35

what drives sap into sieve tubes

Answer 35

positive pressure

Question 36

what is sucrose actively transported into

Answer 36

sieve tubes

Question 37

what does water follow by

Answer 37

osmosis

Question 38

what does the increase in volume create

Answer 38

a flow that moves water and sucrose to a sink

Question 39

what continuously exchanges energy and materials with its environment

Answer 39

every organism

Question 40

for a typical plant where do water and minerals come from

Answer 40

the soil

Question 41

where does carbon dioxide come from

Answer 41

the air

Question 42

what do branching root and shoot system of vascular plants ensure

Answer 42

extensive networking with both reserves of inorganic nutrients

Question 43

what is an organic molecule

Answer 43

a molecule that has carbon as its backbone and is made by a living thing

Question 44

what are inorganic molecules

Answer 44

molecules without carbon

Question 45

what do plants require to complete their life cycle

Answer 45

certain chemical elements

Question 46

what do plants derive most of their organic mass from

Answer 46

co2 of air

Question 47

what do plants depend on

Answer 47

soil nutrients such as water and minerals

Question 48

what is considered an essential element

Answer 48

a chemical element

Question 49

what is required for a plant to complete a life cycle

Answer 49

a chemical element

Question 50

why do researchers use hydroponic culture

Answer 50

to determine which chemical elements are essential

Question 51

what amounts are macronutrients required in

Answer 51

large amounts

Question 52

what amounts are micronutrients required in

Answer 52

small amounts

Question 53

what do you need to make chlorphyll

Answer 53

magnesium

Question 54

what happens to the leaf it it is deficient in magnesium

Answer 54

the leaf wont be green

Question 55

what is it if the leaf is yellow

Answer 55

chlorosis

Question 56

if the mineral moves freely what parts show deficiency

Answer 56

older parts

Question 57

if the mineral doesnt move freely what parts show deficiency

Answer 57

younger parts

Question 58

what is the soils genetic structure

Answer 58

texture

Question 59

what does composition refer to

Answer 59

the soils organic and inorganic chemical components

Question 60

what are major factors that determine if a plant will grow well in a location

Answer 60

texture and composition of the soil

Question 61

what is soil quality a major determinant of

Answer 61

plant distribution and growth

Question 62

distinct soil layers are called what

Answer 62

horizons

Question 63

after a heavy rain fall what does water do

Answer 63

drain away from larger spaces of soil

Question 64

why do small spaces retain water

Answer 64

because of their attraction to surfaces of clay and other particles

Question 65

what is the loss of topsoil

Answer 65

erosion

Question 66

what causes erosion

Answer 66

rain, wind, and topsoil

Question 67

what do acjds derived from roots contribute to

Answer 67

a plants uptake of minerals

Question 68

what is irrigation

Answer 68

watering

Question 69

water that sticks to soil is not availible to what

Answer 69

plants

Question 70

why type of charge does soil have

Answer 70

negative

Question 71

what happens when you release hydrogen in soil

Answer 71

it gets more acid