Bioenergetics- BIOLOGY Flashcards
What is the word equation for photosynthesis?
Carbon dioxide + water -> (light) glucose + oxygen
Is photosynthesis endothermic or exothermic?
Endothermic
How does water get into plants?
It diffuses into the root hair cells, then travels through the xylem.
Why are stomata essential parts of the leaf?
They allow gases to diffuse
Why are guard cells important?
They control gas exchange
What are the layers of a leaf?
-Waxy layer
-Upper epidermis
-Palisade Mesophyll
-Spongy Mesophyll
-Lower epidermis
What are the adaptions of a leaf?
Thin
Broad
Lots of chlorophyll
Veins
Air spaces
Guard cells
Why is it important for a leaf to be thin?
So it has a large surface area to absorb light
Why is it important for a leaf to be broad?
The diffusion distances are small and more effective
Why is it important to have a lot of chlorophyll?
So the plant can absorb a lot of light
Why is it important for the leaf to have veins?
Good access to water
Why is it important for leaves to have air spaces?
It allow carbon dioxide for photosynthesis
Why is it important to have guard cells?
To regulate gas exchange
What are the uses of glucose in a plant?
Starch for energy storage.
Proteins for growth,
Oil for energy storage
Cellulose for cell walls
To make chlorophyll
What are the limiting factors for photosynthesis?
-temperature
-carbon dioxide concentration
-light intensity
