plant tissues and organs

Question 1

what are plant tissues?

Answer 1

collections of cells specialised to carry out specific functions

Question 2

what is an example of an organ system in a plant? (3)

Answer 2

roots
stem
leaves

Question 3

what is xylem’s function?

Answer 3

transpiration

Question 4

what is phloem’s function?

Answer 4

translocation

Question 5

what are some characteristics of xylem? (5)

Answer 5

only has water
tube made out of dead cells
strengthened by lignin
one way flow
made from cells

Question 6

what are some characteristics of phloem? (4)

Answer 6

has water and sugar
tube made out of living cells
two way flow
made from cells

Question 7

how do root hair cells allow more water to enter by osmosis?

Answer 7

increase surface area

Question 8

what do root hair cells contain and why?

Answer 8

lots of mitochondria to provide energy for active transport

Question 9

what are stomata?

Answer 9

holes in leaves that open and close to let carbon dioxide in and out

Question 10

how does water leave the stomata?

Answer 10

evaporation

Question 11

what are the factors affecting transpiration? (4)

Answer 11

temperature
humidity
wind speed
light intensity

Question 12

how can temperature affect transpiration? (2)

Answer 12

hotter temperature means particles move faster
more evaporation

Question 13

how can humidity affect transpiration?

Answer 13

more water in the air means less can be evaporated from stomata

Question 14

how can wind speed affect transpiration?

Answer 14

it more quickly removes the layer of water vapor on the surface of leaves

Question 15

how can light intensity affect transpiration?

Answer 15

stomata open in the daytime for photosynthesis so more water is lost through the open stomata

Question 16

where do plants and trees experience high rates of transpiration?

Answer 16

tropical locations

Question 17

if a plant had more leaves what will increase?

Answer 17

the rate of transpiration

Question 18

what is the word equation for photosynthesis?

Answer 18

water + carbon dioxide = glucose + oxygen

Question 19

what is the symbol equation for photosynthesis?

Answer 19

6H2O + 6CO2 = C6H12O6 + 6O2

Question 20

how is glucose stored in plants?

Answer 20

as starch

Question 21

how does water enter the plant?

Answer 21

travels up from the roots (xylem)

Question 22

what is chlorophyll?

Answer 22

the green stuff where the chemical reactions happen

Question 23

what happens to plants if the temperature is too high?

Answer 23

the enzymes denature

Question 24

at what time does carbon dioxide work best in plants?

Answer 24

at night as the plant respires but doesn’t photosynthesise

Question 25

what is the method for testing a leaf for starch? (7)

Answer 25

place leaf in boiling water for 1-2 mins remove leaf from water and put into boiling tube fill boiling tube with ethanol and place back into hot water leave for 1-2 minutes remove leaf from ethanol and place onto white tile flatten leaf and add iodine solution note any colour change

Question 26

what is the word equation for glucose?

Answer 26

glucose + oxygen = carbon dioxide + water + energy

Question 27

what is respiration?

Answer 27

how all living things generate energy through the use of glucose and oxygen

Question 28

what does it mean when something is insoluble?

Answer 28

doesn't interfere with osmosis

Question 29

how do plants convert convert glucose into amino acids?

Answer 29

by adding nitrates

Question 30

how are mineral ions absorbed by plants?

Answer 30

by active transport

Question 31

what is a reason humans get overweight?

Answer 31

lipids

Question 32

why do plants convert glucose to fats?

Answer 32

to store energy in plants

Question 33

what are plants fats normally?

Answer 33

oils