biology unit 3

Question 1

costic

Answer 1

burns alittle bit

Question 2

shoot system

Answer 2

everything above the ground

Question 3

root system

Answer 3

everything below ground

Question 4

epidermal

Answer 4

exchange of matter and gas, protects plant from disease

Question 5

cuticle

Answer 5

resists attack from micro-organisms, reduces water loss- is transparent

Question 6

ground tissue

Answer 6

strength and support, food/water storage- is the majority of the plant

Question 7

mesophyll tissue

Answer 7

specialized ground tissue containing chloroplasts

Question 8

palisade mesophyll tissue

Answer 8

site of photosynthesis, contains chloroplasts, needs CO2 to produce O2

Question 9

spongy mesophyll tissue

Answer 9

gas exchange by diffusion, moves oxygen to the stomata

Question 10

vascular tissue

Answer 10

a transport tissue, carries water and nutrients through a plant

Question 11

xylem

Answer 11

roots to leaves, carries water and minerals

Question 12

phloem

Answer 12

leaves to rest of the plant, carries sugar (sugar water)

Question 13

vascular bundle

Answer 13

strand of xylem and phloem

Question 14

stomata

Answer 14

holes that are used for gas exchange O2 + CO2, controls water release

Question 15

root hairs

Answer 15

for surface area, absorption of water and minerals

Question 16

guard cells

Answer 16

form around stomata, open and close, contain chloroplasts

Question 17

lenticels

Answer 17

open for gas exchange and transpiration, rough and woody

Question 18

cellular respiration

Answer 18

sugar into energy, in the mitochondria, sugar is from photosynthesis

Question 19

transpiration

Answer 19

water that eventually diffuses through the leaf

Question 20

cohesion

Answer 20

sticks together, example : water- this helps the water in the xylem to stick together as it goes up

Question 21

adhesion

Answer 21

one thing sticks together, example: tape and water- this helps the water to inch up in the xylem tube, past the two meter point

Question 22

meritism

Answer 22

area of tremendous cell division to help them grow

Question 23

sink

Answer 23

what holds the water- and where the sugar is needed (fruit)

Question 24

phototropism

Answer 24

plants will grow towards the light

Question 25

gravitropism

Answer 25

roots will grow along with gravity - down

Question 26

tropism

Answer 26

response to

Question 27

auxim

Answer 27

plant hormone, change in elasticity, runs away from the sun

Question 28

hormone

Answer 28

chemical that will tell cells to do things

Question 29

auxim in shoot

Answer 29

promotes cell elongation

Question 30

auxim in roots

Answer 30

prevents elongation of cell growth

Question 31

how do guard cells open and close

Answer 31

• can manually close due to water swelling in vacuoles, and this can be forced by signaling K+ into the vacuoles drawing up water (osmosis)
• and the other way around, sending back the K+ and the water

Question 32

where do plants get their food from

Answer 32

plants produce their own food, through photosynthesis

Question 33

formula for photosynthesis

Answer 33

6CO2+6H20–> C6H206+6H20

Question 34

sugar transpiration -simply is

Answer 34

source –> phloem–> sink

Question 35

positive and negative determines

Answer 35

if its going with nature or not

Question 36

stem in light =

Answer 36

positive photropism

Question 37

stem in dark =

Answer 37

negative gravitropism

Question 38

root in light =

Answer 38

negative photropism

Question 39

root in dark =

Answer 39

positive gravitropism

Question 40

root pressure

Answer 40

high pressure in the roots that makes osmosis possible, only gets it 2m into xylem tubes

Question 41

transpiration pull

Answer 41

evaporation of water through the stomata or lenticels, as each water molecule is evaporated it creates a pull on the last to follow (like domino)

Question 42

stomata and lenticles also..

Answer 42

help pull up the water by “sucking” it (force of osmosis and the transpiration pull)