Topic 6) Plant Structures and their Function Flashcards
How is water in the root transported to the leaves?
Osmosis
Up the xylem
By transpiration
What are the reactants of photosynthesis?
CO2 + water
How does CO2 enter the plant?
Enters through the stomata
Where does photosynthesis take place?
In the chloroplast
Leaves and steam
Why are the leaves good for photosynthesis?
They have adapted large surface areas
How is water vapour lost from plants?
Transpiration
What are the factors of the rate of transpiration?
Humidity
Temperature
Light intensity
Wind speed
How does temperature effect the rate of transpiration?
The warmer it is, the faster water evaporates from the leaves
How does humidity effect the rate of transpiration?
The lower the humidity, the faster water evaporates
How does wind speed effect rate of transpiration?
The windier it is, the faster moist air is taken away from the leaf surface
How does light intensity effect rate of transpiration?
Transpiration is faster when the stomata are open in the light
what are stomata for?
holes on the underside of the leaf through which gases move in and out
what are the holes in the leaves called?
stomata
when glucose combine with minerals, what is made?
new chemical substantces
when glucose combines with nitrogen, what is made?
proteins needed for growth
when glucose combines with magnesium, what is made?
chlorophyll needed for photosynthesis
what does the waxy cuticle do?
stops water loss
what does the epidermis do?
the outer most boundary, protects the leaf
what does the palisade layer do?
to prevent water getting out and stopping unwanted substances/organisms
what does the spongy mesophyll/layer do?
where gas exchange occurs
what does the vascular bungle do?
transfers water and glucose
what do the stomata and guard cells do?
allows gases to move in and out of the cell
what are xerophyte plants?
plants that are adapted to live in dry, hot conditions
example of a xerophyte plant
cactus
