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Flashcards in Plant Nutrition II Deck (362)
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1

Complete this gap fill:

During photosynthesis ... energy is absorbed by a pigment called ... which can be found in the ... of plant cells. This light energy is then used to convert ... from the soil and ... from the air into a simple sugar called ... . As a by-product of photosynthesis, ... is made.

During photosynthesis light energy is absorbed by a pigment called chlorophyll which can be found in the chloroplasts of plant cells. This light energy is the used to convert water from the soil and carbon dioxide from the air into a simple sugar called glucose . As a by-product of photosynthesis, oxygen is made.

2

Is chlorophyll found in chloroplasts or are choloroplasts found in chlorophyll?

chlorophyll is found in chloroplasts

3

Complete this gap fill:

The ... made by photosynthesis is stored in plants in form of ... (which is a large molecule made of thousands of glucose molecules).

The production of ... can be tested using ... solution, which turns from ... to ...

The glucose made by photosynthesis is stored in plants in form of starch (which is a large molecule made of thousands of glucose molecules).

The production of starch can be tested using iodine solution, which turns from orange/brown to blue/black

4

If no photosynthesis has occured, when iodine solution is put on a leaf, what colour will the leaf be? Why?

orange/brown

no glucose or starch is present

5

If photosynthesis has occured, when iodine solution is put on a leaf, what colour will the leaf be? Why?

blue/black

glucose and starch is present

6

How do you carry out the test for starch?

1. remove leaf from plant

2. boil (30 seconds)

3. boil ethanol for 15 minutes to remove colour

4. wash the leaf with cold water

5. add iodine solution

7

What does a leaf-vein cross-diagram look like?

8

Complete this gap fill:

We can test for the requirement of light by ... part of the leaf with foil or card. No ... should be produced in this area and so this area will remain ... when tested with ...

We can test for the requirement of light by covering part of the leaf with foil or card. No starch should be produced in this area and so this area will remain orange/brown when tested with iodine

9

Complete this gap fill:

We can test for the requirement of light by using ... leaves which have no ... in the white areas. No ... should be produced in this area so this area will remain ... when tested with ...

We can test for the requirement of light by using variegated leaves which have no chlorophyll in the white areas. No starch should be produced in this area so this area will remain orange/brown when tested with iodine

10

Complete this gap fill:

We can test for the production of oxygen using a ... plant such as ... . As photosynthesis takes place ... of gas becomes visible. These can be collected in a ... and tested for oxygen with a ... splint.

We can test for the production of oxygen using a water plant such as Elodea . As photosynthesis takes place bubbles of gas becomes visible. These can be collected in a boiling tube and tested for oxygen with a glowing splint.

11

Complete this gap fill:

We can test for the need for carbon dioxide using ... . This traps the carbon dioxide from the ... , so that it is no longer available for .... Leaves cultured in the presence of ... should not turn ... when test for starch using iodine. 

We can test for the need for carbon dioxide using soda lime . This traps the carbon dioxide from the air , so that it is no longer available for photosynthesis. Leaves cultured in the presence of soda lime should not turn blue/black when test for starch using iodine. 

12

Label this leaf cross-section diagram

13

what is the fuction of the waxy cuticle?

waterproof, reduces water loss

14

what is the fuction of the upper epidermis?

protection, lets light through for photosynthesis

15

what is the fuction of the palisade cells?

tightly packed, lots of chloroplasts, high rate of photosynthesis

16

what is the fuction of the spongy cells?

loosely packed, some chloroplasts, some photosynthesis

17

what is the fuction of the air spaces?

provide air channels through leaf for gas exchange

18

what is the fuction of the phloem?

carries dissolved sugar (sucrose) to rest of the plant

19

what is the fuction of the xylem?

carries water and minerals from roots to leaf

20

what is the fuction of the guard cells?

control opening and closing of stomata

21

what is the fuction of the stomata

control gas exchange and water loss from leaf

22

how are leaves adapted to carry out photosynthesis (chlorophyll needed)?

palisade cells are tightly packed, and they contain lots of chloroplasts

upper epidermis lets in lights

leaf has a large SA/V ratio, absorbs lots of light

another layer of cells underneath to get any extra light

23

how are leaves adapted to import raw materials for photosynthesis (water and CO2 needed)?

xylem brings water up from the roots

guard cells open up and CO2 comes in via stomata

air spaces provide channels for CO2 to access palisade cells

24

how are leaves adapted to get rid of photosynthesis waste products (O2)?

oxygen leaves via stomata, opened by guard cells

25

how are leaves adapted to export sugar from photosynthesis to parts of plant that need them (glucose)?

phloem can transport sugar

26

what is the leaf structure with the following function:

waterproof, prevents water loss

waxy cuticle

27

what is the leaf structure with the following function:

protection, lets light through photosynthesis

upper epidermis

28

what is the leaf structure with the following function:

tightly packed, lots of chloroplasts, high rate of photosynthesis

palisade cells

29

what is the leaf structure with the following function:

loosely packed, some chloroplasts, some rate of photosynthesis

spongy cells

30

what is the leaf structure with the following function:

provide air channels through leaf for gas exchange

air spaces