B2 Flashcards
Photosynthesis (20 cards)
\what is the equation for photosynthesis?
carbon dioxide+ water——> glucose+ oxygen
The green leaves of a plant make glucose for the plant to use. What are two uses of glucose in a plant?
A. To absorb water
B. For respiration
C. To release minerals
D. To store as starch
B. For respiration
D. To store as starch
what reagent do you use for testing for starch?
iodine
what type of reaction is photosynthesis?
A. endothermic
B. exothermic
C. neutralisation
A. Endothermic
complete the sentence:
If the temperature is decreased the rate of photosynthesis will ________.
A. decrease
B. increase
C. stay the same
A. decrease
what colour does the reagent used for testing for starch?
orange to black/blue
which 4 things determine the rate of respiration?
temperature, light, wind, humidity
what is transPIRATION?
the movement of water through the plant and leaves
what is the function of Xylem?
Transports water and mineral ions from the roots to the stem and leaves
what is the function of the Phloem?
Transports dissolved sugars e.g. Glucose
what is transLOCATION?
The movement of Glucose from the leaves to the rest of the plant
name 2 uses plants have for Glucose
Growth
or
to store starch
or
to make fruits
or
to make seeds
Name the type of cell that is responsible for most of a plants photosynthesis
Palisade Mesophyll layer
Which cells control the diffusion of gases into and out of a leaf?
guard cells
In a leaf what is the function of the upper epidermis?
They are thin & transparent and allows light to pass through
Which two types of tissue make up the vascular bundles?
Xylem and Phloem
where does water enter the plant?
The roots
what colour would the leaves of a plant turn if it has a magnesium deficiency?
yellow
what would a plant look like if it has a phosphate deficiency?
discoloured leaves, poor bud and flower growth
define: Turgid and Flaccid
Turgid- when water enters the cell by osmosis and fills the vacuole. This pushes against the inelastic cell wall.
Flaccid- When the water moves out the cell by osmosis and the vacuole shrinks
