T2 Flashcards
WHAT IS THE FUNCTION OF STARCH GRANULES IN PLANTS?
To store food
What is the independent variable?
The variable that is altered during a scientific experiment
What is the dependant variable?
The variable being tested or measured in a scientific experiment
What is the control variable?
a variable that is kept the same during a scientific experiment. Any change in a controlled variable would invalidate the results
What is translocation?
the transport of dissolved sugars around a plant in the phloem
What directions can the phloem transport sugars
All
What is transpiration?
the evaporation and movement of water away from the plant’s leaves from the inside of the plan
What is the transpiration stream?
Water moves through the xylem
What are xylem?
Hollow Tubes that transport water and mineral ions up the plant to the leaves
What factors can alter the rate of transpiration?
Tewind
mperature (more energy =more likely to evaporate out the stomata)
Light intensity (The stomata open wider to let in carbon dioxide for photosynthesis)
Airflow (The concentration between inside and outside of the leaf)
Humidity (The more water vapour, the lower the rate of transpiration because the concentration gradient is lower)
Why do phloem cells have pores in their walls?
To allow cell sap to pass along the phloem tube
What is the test for sugars?
Benedict’s test
What is the test for proteins?
Biuret test
What is the test for starch?
Iodine test
What is the test for lipids?
Sudan 3 or emulsion test
