Plants (part 2)

Question 1

What do phloem vessels transport?

Answer 1

sucrose and amino acids

Question 2

Do phloem cells contain cytoplasm?

Answer 2

yes

Question 3

What is the movement of sucrose and amino acids called?

Answer 3

translocation

Question 4

What are the adaptions of phloem cells?

Answer 4

Sieve plates, companion cells, reduced internal structure, a two-way flow

Question 5

What are sieve plates?

Answer 5

Perforated walls that connect the phloem cells, so water with dissolved foods can move freely through

Question 6

Do phloem cells have a nucleus?

Answer 6

no

Question 7

Do phloem cells have a vacuole?

Answer 7

no

Question 8

What are companion cells?

Answer 8

Cells with lots of mitochondria surrounding the phloem cells that provide the energy the phloem needs to transport the sucrose and animo acids

Question 9

Why do phloem cells have a reduced internal structure?

Answer 9

To reduce resistance for translocation

Question 10

In summer, where is the source in a potato-like plant?

Answer 10

photosynthesising leaves

Question 11

In summer, where is the sink in a potato-like plant?

Answer 11

roots for storage

Question 12

In winter, where is the source in a potato-like plant?

Answer 12

storage organs

Question 13

In winter, where is the sink in a potato-like plant?

Answer 13

other parts of plants for respiration

Question 14

In spring, where is the source in a potato-like plant?

Answer 14

storage organs, eg roots

Question 15

In spring, where is the sink in a potato-like plant?

Answer 15

growing areas- eg new shoots and roots

Question 16

what colour will a positive result to the iodine test give?

Answer 16

blue-black

Question 17

what colour will a negative result to the iodine test give?

Answer 17

orange-brown

Question 18

Which chemical is added in the bubble experiment to supply CO2?

Answer 18

Sodium hydrogen carbonate

Question 19

What is the acronym used to remember what glucose is used for and what does it stand for?

Answer 19

Respiration
Starch
Protein
Cellulose
fats And lipids

Question 20

What is the equation for photosynthesis?

Answer 20

6CO2 + 6H2O -> C6H12O6 + 6O2

Question 21

Does chlorophyll contain starch?

Answer 21

yes

Question 22

What are the limiting factors of photosynthesis?

Answer 22

light intensity, CO2, temperature, water, chlorophyll

Question 23

the graph for the limiting factors of photosynthesis looks the same for all but one of the limiting factors. which one, and why?

Answer 23

Temperature- although the higher temperatures give the particles more kinetic energy so they can react quicker, eventually the enzymes denature

Question 24

How are plants adapted to maximise photosynthesis?

Answer 24

• large SA
• palisade cells have many chloroplasts
• palisade cells are at the top of the cell
• spongy mesophyll are irregular to maximise air space
• thick cuticle made of wax to prevent damage without blocking sunlight

Question 25

how does more chlorophyll lead to a larger crop yield?

Answer 25

more chlorophyll
V
more light absorbed for photosynthesis
V
more photosynthesis
V
more glucose and starch production
V 
more substances for respiration
V
more energy released for growth
V
larger crop yield

Question 26

What does a deficiency in magnesium cause for plants?

Answer 26

Yellow leaves

Question 27

What does a deficiency in nitrates cause for plants?

Answer 27

Poor growth, yellow leaves

Question 28

What does a deficiency in potassium cause for plants?

Answer 28

Poor root growth, discoloured leaves

Question 29

What does a deficiency in phosphorus cause for plants?

Answer 29

Poor fruit and flower growth, discoloured leaves

Question 30

Yellow leaves are a symptom of…

Answer 30

Magnesium and nitrate deficiencies

Question 31

Poor root growth is a symptom of…

Answer 31

Phosphorus

Question 32

Poor fruit and flower growth is a symptom of…

Answer 32

Potassium

Question 33

Why, in an experiment about mineral deficiencies in plants, would a scientist cover the tube with black paper?

Answer 33

To simulate the roots being underground

Question 34

Give an example of biological control in greenhouses

Answer 34

Ladybirds eating aphids.

Question 35

Glucose can be stored as…

Answer 35

Insoluble starch

Question 36

Your data is _____ if it can be obtained by a different team with the same method

Answer 36

Reproducible

Question 37

Which mineral ion is used to make chlorophyll?

Answer 37

Magnesium

Question 38

What is the formula for light intensity?

Answer 38

Intensity = 1/d^2 (arbitrary units)

Question 39

If a plant needs minerals, we can…

Answer 39

Give it fertilisers