plant nutrition 🎀 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

what does photosynthesis produce for a plant?

A

‘food’ so it can survive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what energy does photosynthesis convert?

A

light energy to chemical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

word equation for photosynthesis?

A

carbon dioxide + water - glucose + oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

balanced chemical equation for photosynthesis?

A

6CO2 + 6H2O - C6H12O6 + 6O2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

TESTING A LEAF FOR STARCH: why do you boil the leaf for 2 mins in water?

A

kills the leaf and stops it photosynthesising

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

TESTING A LEAF FOR STARCH: why do you turn the bunsen burner off?

A

ethanol is flammable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

TESTING A LEAF FOR STARCH: why do you heat the leaf in ethanol?

A

removes the green colour (chlorophyll) from leaf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

TESTING A LEAF FOR STARCH: why do you rinse the leaf in warm water?

A

softens leaf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

TESTING A LEAF FOR STARCH: why do you add iodine to the leaf?

A

see if leaf contains starch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

why is light needed for photosynthesis?

A
  • cover part of leaf with aluminium foil and leave in sunlight.
  • covered parts will be negative for starch (orange/brown)
  • uncovered parts will be positive for starch (blue/black)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

why is chlorophyll needed for photosynthesis?

A
  • variegated leaves show this.
  • white parts go orange/brown when tested with iodine
  • green parts (containing chlorophyll) turn blue/black
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

why is carbon dioxide needed for photosynthesis?

A
  • place plant in beaker of sodium hydroxide (which will absorb CO2 from air)
  • place another plant in beaker of water (which will not absorb CO2 from air)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what does the magnesium ion do?

A

make chlorophyll

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what happens to the plant without magnesium ions?

A

yellow leaves due to less chlorophyll being produced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what does the nitrate ion do?

A

combine with glucose to make amino acids (proteins) for growth.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what happens to the plant without nitrate ions?

A

stunted/less growth due to less protein produced.

17
Q

as light intensity increases…

A

the rate of respiration INCREASES up to a MAXIMUM where it LEVELS OFF.

(even at high light intensity, another factor limits the rate).

18
Q

as co2 concentration increases…

A

the rate of respiration INCREASES up to a MAXIMUM where it LEVELS OFF.

(even at high co2 concentration, another factor limits the rate).

19
Q

as temperature increases…

A

the rate of respiration INCREASES up to a MAXIMUM where it DECREASES.

(at high temperatures the enzymes denature).

20
Q

STRUCTURE OF LEAF -
how is the waxy cuticle adapted for photosynthesis

A

waterproof layer - prevents water loss

21
Q

LEARN HOW TO LABEL DIAGRAM FOR LEAF PARTS

A

A* GIRLIEEE

22
Q

STRUCTURE OF LEAF -
how is the upper epidermis adapted for photosynthesis

A

transparent - maximises sunlight passing through

23
Q

STRUCTURE OF LEAF -
how is the palisade mesophyll adapted for photosynthesis

A

lots of chloroplasts near top of leaf - long and thin to increase S.A. for max light absorption.

24
Q

STRUCTURE OF LEAF -
how is the spongy mesophyll adapted for photosynthesis

A

air spaces - increase S.A. for movement of gases in and out of leaf. close to stomata.

25
Q

STRUCTURE OF LEAF -
how is the xylem adapted for photosynthesis

A

supplies water to leaf from roots

26
Q

STRUCTURE OF LEAF -
how is the lower epidermis/guard cells adapted for photosynthesis

A

many stomata allow CO2 to move in and O2 and water vapour out by diffusiom.

27
Q

EVOLUTION OF O2 FROM ELODEA
what was dependent variable?

A

count the number of O2 bubbles produced per minute to measure rate of photosynthesis.

28
Q

EVOLUTION OF O2 FROM ELODEA
what was independent variable?

A

change distance of light from plant to change light intensity.

29
Q

EVOLUTION OF O2 FROM ELODEA
what was control variable?

A

amount of CO2 or temperature.