*Plant Biology Flashcards
What are the conditions needed for germination
Water
Oxygen
Warmth
Temperature
What is the function of the Epidermis
Protects the leaf
Stops bacteria and viruses entering the leaf
What is the function of the Palisade Mesophll
Most photosynthesis occurs here
Cells packed with chloroplasts
What is the function of the Spongy Mesophll
Some photosynthesis occurs here
Less chloroplasts than palisade
Allows easy movement of gases
What is the function of the vein
Carries water in xylem
What is the function of the guard cells
Increase and decrease in size to control size of the stomata
What is the function of the stomata
Small pores
Allow gases in and out of leaf and how water is lost from the leaf
There are more stomata on the lower surface of the leaf
What is the word equation for photosynthesis
Carbon dioxide+water->glucose+Oxygen+water
What is destarching a plant and when is it used
Destarching occurs when a part of a plant is deprived of starch, due to the lack of photosynthesis
Describe the relationship between respiration and photosynthesis
Photosynthesis makes the glucose that is used in cellular respiration
Water is broken down to form oxygen during photosynthesis, in cellular respiration
Which only occurs at night
Respiration
How is the balance affected at midday compared with dawn or dusk?
At midday when the light intensity is high the rate of photosynthesis is faster than the rate of respiration
At dawn and dusk the rate of photosynthesis and respiration are equal
What colour is red hydrogen carbonate indicator in high carbon dioxide and low carbon dioxide levels
When carbon dioxide is added it becomes orange or yellow
When carbon dioxide is removed it changes to purple
What happens to indicator solution if both a snail and a pond plant are present in a test tube in high light levels
The pond plant turns purple
The snail turns yellow/orange
