Plants (part 2) Flashcards
What do phloem vessels transport?
sucrose and amino acids
Do phloem cells contain cytoplasm?
yes
What is the movement of sucrose and amino acids called?
translocation
What are the adaptions of phloem cells?
Sieve plates, companion cells, reduced internal structure, a two-way flow
What are sieve plates?
Perforated walls that connect the phloem cells, so water with dissolved foods can move freely through
Do phloem cells have a nucleus?
no
Do phloem cells have a vacuole?
no
What are companion cells?
Cells with lots of mitochondria surrounding the phloem cells that provide the energy the phloem needs to transport the sucrose and animo acids
Why do phloem cells have a reduced internal structure?
To reduce resistance for translocation
In summer, where is the source in a potato-like plant?
photosynthesising leaves
In summer, where is the sink in a potato-like plant?
roots for storage
In winter, where is the source in a potato-like plant?
storage organs
In winter, where is the sink in a potato-like plant?
other parts of plants for respiration
In spring, where is the source in a potato-like plant?
storage organs, eg roots
In spring, where is the sink in a potato-like plant?
growing areas- eg new shoots and roots
what colour will a positive result to the iodine test give?
blue-black
what colour will a negative result to the iodine test give?
orange-brown
Which chemical is added in the bubble experiment to supply CO2?
Sodium hydrogen carbonate
What is the acronym used to remember what glucose is used for and what does it stand for?
Respiration Starch Protein Cellulose fats And lipids
What is the equation for photosynthesis?
6CO2 + 6H2O -> C6H12O6 + 6O2
Does chlorophyll contain starch?
yes
What are the limiting factors of photosynthesis?
light intensity, CO2, temperature, water, chlorophyll
the graph for the limiting factors of photosynthesis looks the same for all but one of the limiting factors. which one, and why?
Temperature- although the higher temperatures give the particles more kinetic energy so they can react quicker, eventually the enzymes denature
How are plants adapted to maximise photosynthesis?
- 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
