2e- nuitrition in plants Flashcards

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1
Q

word eq for photosyntheis

A

carbon dioxide + water –> glucose + oxygen

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2
Q

balanced chem eq for photosunthesis

A

6CO^2 + 6H^2O –> C^6H^12O^6 + 6O^2

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3
Q

identify the energy changes in photosynthesis

A

light –> chemical

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4
Q

identidy teh reactants and products

A

reactants= water and carbon dioxide
products = glucose and oxygen

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5
Q

balanched word eq for photosyntheis

A

6 molecules of carbon dioxixe, 6 molecules of oxygen –> 6 molecules of oxygen and 1 molecule of glucose

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6
Q

write a methid to test a lleaf for starch and include any safety points

A
  • boil water in a beaker and place the leaf inside for 1 minute (makes teh leaf softer and removes wax layer)
  • turn the bunsen burner off (we are abt 2 use ethanol –> highly flammable.
  • place the leaf into ethanol and put the boiling tube inot a beaker of bioling water until the leaf turns white. (removes chlorophyll so the leaf turns white).
  • wash the leaf in boiling water ( ethanol does not react w/ iodine)
  • flood the leaf w iodine on a white time and leave to dry. iodine = starch indicator, blue/ black = high starch present.
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7
Q

what are the orders of tissue in the cross section of a leaf.

A

cuticle, upper epidermis, palaside mesohpyll, spongy mesophyll, lower epidermis, cuticle, guard cell, stomata

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8
Q

what is an adaptiation

A

cell orgamnism = change in shapefor an increase in efficiency in f(x).

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9
Q

what is the adaptation of the cuticle (waxy layer)

A

waxy 2 stop the leaf from losing water from evaporating from sun.

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10
Q

upper epidermis

A

transparent 2 allow light to reach chloroplasts in the palaside cells, tissue is thin 2 keep palaaside layer close ti the top leaf.

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11
Q

palaside mesophyll

A

main site of photosyntheis
cells = thin and tall to increas sa for absorbing light.
large no. of chloroplasts = more photosynthetsis.
large vacuole = store water 2 be used for photosynthesis.
tissue = close to the top 2 absorb sunlight.

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12
Q

spongy mesophull

A

this tissue = gases 2 diffuse 2 the palaside layer
air spaces = 2 allow gas exchange.

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13
Q

lower epidermis

A

controls gas exchange and water loss
how to change shape to open holes called the stomata
will change shape 2 stop water loss
stomata = hole = gases to diffuse in and out of the leaf.

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14
Q

write a definition of a limiting factor

A

a factor in the env. that can change the rate of photosynthesis

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15
Q

what are limiting factors in phtoosyntehs

A
  • carbon dioxide concentration
  • light intensity
  • temperature
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16
Q

explain why each lf affects the rop

A
  • carbon dioxide concentration, provides more reactants for the reaction.
  • temmperator effects the KE of enzymes
  • the light intensity provides more energy for the reaction.
17
Q

why do graphs levels of

A

bc lfs stop becoming lfs and other aspects.

18
Q

write a method 2 investigate how light effects the rop

A
  1. fill a beaker w water ( this will absorb any heat energy and keep the temp the same throughout the experiment)
  2. cut a strand of pondweed fromn the plant ( length = same each time)
  3. pondweed into boiling tube that contains 1g/l of sodium hydrogen carbonate ( co2 concentartion constant)
  4. cute the stem of the pondweed underwater at an angle.
  5. put the lamp close to the pondweed for 5 mins.
    6., move the lamp along a 1 meter ruler to adifferent lengths
  6. count number of bubbles produced or collect the gas in a gas syringe
  7. calculate the rate of bubbles pper minute
19
Q

design an experiment using corms- experiment of co2 concentration on the rop

A

C- change the concentration of CO
O- organism is teh same type of pondweed
R–3 times for each concentratuon
M- rate of photosyntehis, counting bubbles produced in 5 mins.,
S- same length of pondweed
S- same temp by using water bath around the plant.
S- same light intensity by using the same bulb at the same distance from the plant each time.

20
Q

what mineral ions do plants need and why

A
  • magnesium ions, needed to make chlorophyll, chlorophyll = essential for photosynthesis
  • nitrate ions, source of nitrogen 2 make amino acids 2 build proteins .
21
Q

what happens if there are no different ions

A

no magnesium ions = yellowing between veins of leaves (chlorosis)
no nitrate ions = stunted growth, and yellowing of leaves