M6 Deck - Nutrition (Photosynthesis) Flashcards

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1
Q

What is Photosynthesis?

A

the process used by plants to convert energy of light, water, oxygen and carbon dioxide into a glucose used for energy

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2
Q

What are the three types of nutrition?

A

Autotroph
Heterotroph
Sapprophyte

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3
Q

What is autotrophic nutrition?

A

plants that make their own food; “self feeders”.

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4
Q

What is heterotrophic nutrition?

A

consumers that feed on other organisms

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5
Q

What is saprophyte?

A

decomposers that feed on the dead autotrophs and heterotrophs

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6
Q

What is glucose used for?

A

it used for the plant to make all the carbohydrates, fats and proteins it needs.

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7
Q

Why must autotrophic nutrition occur before heterotrophic nutrition?

A

first the plant takes in inorganic substances to make then organic then animals can feed on the plants

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8
Q

Why are saprophytes valuable?

A

they are valuable because the feed on the dead plants and animals and cycle their materials back to earth

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9
Q

What is the simple equation for Photosynthesis?

A

6CO2 + 6H2O —–> C12 H6 06 + 6O2

carbon dioxide + water —> glucose + oxygen

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10
Q

What is chlorophyll?

A

a complex green pigment found inside the chloroplast used to trap the light energy.

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11
Q

What are the two main stages in photosynthesis?

A

the light-dependent stage and the light-independent stage

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12
Q

What 2 things happens in the light-dependent stage?

A
  • the energy trapped by chlorophyll is used to split water (H2O) into hydrogen and oxygen.
  • The oxygen is a waste and gets diffused out of the leaf.
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13
Q

Which stage of photosynthesis does not need light?

A

the light-independent stage

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14
Q

What happens in the light-independent stage?

A
  • the hydrogen combines with the carbon dioxide (CO2) to make carbohydrates (aka. glucose)
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15
Q

Which organ is specialized for photosynthesis?

A

the leaf has many cells arranged in a way suited for photosynthesis.

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16
Q

Why are plants seen to be green?

A

because the chlorophyll in the chloroplast absorbs all color from the light spectrum except green color spectrum

17
Q

What two substances combine to produce carbohydrates?

A

carbon dioxide and water combine to produce carbohydrates (glucose).

18
Q

blank card sorry

A

ok hi

19
Q

What are necessary factors for photosynthesis?

A
  1. Carbon Dioxide
  2. Water
  3. Sunlight
  4. Chlorophyll
20
Q

What do carbohydrates release and how?

A

they release energy by cell respiration

21
Q

Carbohydrates convert into..

A

starch for storage because glucose is not a good storage molecule

22
Q

What gets transported through the phloem?

A

carbohydrates that change into sucrose

23
Q

Carbohydrates combine to form which two substances and what are they used for?

A

fats and oils; they are used to form cell membrane and to store food.

24
Q

how are protein molecules formed?

A

they are formed by carbohydrates joining together with mineral salts from soil.

25
Q

Photosynthesis takes place in which part of a plant cell?

A

The chloroplasts

26
Q

Plants can convert sugars into protein using which mineral ion obtained from the soil?

A

Nitrate Proteins and amino acids contain nitrogen which enters the plant from the soil in the form of nitrate ions

27
Q

Where does the water needed for photosynthesis usually come from in plants?

A

Soil Root hairs absorb the water needed by the plant for photosynthesis from the soil

28
Q

If the rate of photosynthesis is reduced, which of the following important processes is also reduced?

A

Growth: More photosynthesis means more sugars which can be used to grow a bigger plant

29
Q

Photosynthesis is a process in…

A

plants and algae: Animals cannot photosynthesise and rely on plants to provide their food either directly (herbivores) or indirectly by eating other animals

30
Q

Various factors can limit the rate of photosynthesis. Which of these variables can limit photosynthesis?

A

Carbon dioxide concentration : there is normally sufficient carbon dioxide in the atmosphere to keep plants fully supplied

31
Q

Which very important gas is given off as a by-product of photosynthesis?

A

oxygen

32
Q

Farmers will use heated greenhouses for faster growth of crops. This increases photosynthesis by increasing the…

A

temperature: Photosynthesis is a series of chemical reactions. Chemical reactions usually increase in speed as temperature is increased