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Bio > nutrition in plants > Flashcards

nutrition in plants Flashcards

1
Q

what is photosynthesis

A

this is the process by which plants convert light into energy

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2
Q

what are the limiting factors of photosynthesis

A

light intensity
amount of c02
temperature

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3
Q

how does temperature affect photosynthesis

A

this is because it controlled the enzymes so if it was warmer it would have more energy but if it get too high then the enzymes de nature

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4
Q

what is the equation for photosynthesis

A

carbon dioxide + water –> glucose + oxygen

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5
Q

how does light affect photosynthisis

A

the more light the plant receives the faster the rate of photosynthesis
but other factors limit it.

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6
Q

carbon dioxide concentration

A

this is needed for the reaction but it is also limited by itself or other factors

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7
Q

what is the the top layer of a leaf

A

waxy cuticle

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8
Q

what is bellow the waxy cuticle

A

upper epidermis

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9
Q

where in a leaf is it the highest amount of chloroplasts

A

palisade mesophyll

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10
Q

what is below the spongy mesophyll

A

lower epidermis

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10
Q

what is bellow the palisade mesophyll

A

spongy mesophyll

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11
Q

what is the cell that allows things in and out of the leaf

A

guard cell

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12
Q

what is the little hole on the bottom of the leaf called

A

stomata

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13
Q

what is the role of the waxy cuticle

A

this prevents water from evaporating

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14
Q

what is the role of the upper epidermis

A

it is thin and transparent to allow light into the palisade mesophyll layer

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15
Q

what is the role of the palisade mesophyll

A

column shaped cells tightly packed with chloroplasts to absorb more light, maximising photosynthesis

16
Q

what is the role of the spongy mesophyll

A

it increase surface area to volume ratio to maximise diffusion

17
Q

what is the role of the lower epidermis

A

it contains guards cells and stomata

18
Q

what is the role of the guard cell

A

opens and closes the stomata to allow cardon dioxide to diffuse in

19
Q

what is the stomata

A

it is where plant gas exchange happens. this is mainly used for water regulation

20
Q

what does magnesium help with

A

this is needed to make chlorophyll

21
Q

what happens if a plant has a magnesium defiantly

A

causes yellowing between the veins of leaves

22
Q

what do nitrates help with

A

they are sources of nitrogen need to create amino acids to build proteins and DNA

23
Q

what happens if you have an nitrate deficiency

A

causes stunted growth

24
Q

how to test for photosynthesis

A

pondweed
count the bubbles

25
Q

how do you test leaf for starch

A

put lef in boiling water to break down cell walls.
put leaf in ethanol to get rid of chlorophyll
add iodine solution

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