Photosynthesis Flashcards
Why are the chloroplasts short and fat rather than tall and thin?
To cover more surface area and therefore capture more sunlight
What is the word equation for photosynthesis
Carbon dioxide + water —> oxygen + glucose
What is the symbol equation for photosynthesis?
CO2 + H2O —> C6H12O6 + O2
Why do plants produce glucose in photosynthesis. What is it stored as
To use for respiration - stored as a starch
What do plants take in
Water, carbon dioxide, sunlight
What is the waxy layer for
So it doesn’t absorb too much water
What is photosynthesis
A chemical reaction that happens in green plants and algae
Why does cutting down trees contribute to global warming
Because they produce oxygen and take In carbon dioxide
What are chloroplasts
Contains greens pigment chlorophyll which absorbs sunlight for photosynthesis
Why are leaves thin?
Provides a short distance for carbon dioxide to move by diffusion into the leaf
What is the stomata for
Allows carbon dioxide to move by diffusion onto the lead
What are the guard cells for
To open and close the stomata depending on the conditions
What is the xylem for
To transport water
What is the Phloem for
To transport food
Why do lead have large surface areas
So that it can absorb a lot of light
Why is the palisade cell at the top
It is where the light hits first (after the waxy layer)
Where is water absorbed
the root hair cells
What are some qualities of root hair cells
Big surface area and thin walls - let water pass easily
What do plants do when it’s dark
Respire, no photosythesis
What do plants do when it’s light
Photosynthesise and respire
What are the air gaps for
Allows gases to go through
Spongy layer
Absorbs gases
Petal
Attract bees and insects for pollination
Stem
To hold the plant up
Carries water from the roots to the leaf
Roots
Anchors the plant
Digs into soil for nutrients
Biomass
The increase of biological material and mass. The increase of dry biomass of biological material a over a given period of time
Dry biomass
Dead organisms dried out by heat
Wet biomass
Heavier, more water particles, wet, usually alive
What do pyramids of biomass show?
The collective wet biomass of organisms at each stage of a food chain
How do plants increase their biomass
Carbon dioxide and water - increase in the sugar
Pesticide
Pest (insect) killer
Bio accumulation
When toxin is spread and increased throughout a food chain
How does bioaccumulation work?
Inset eats plant sprayed with pesticide. Birds eat the insect and die from it
Where do plants get minerals from
The soil, dead organisms
How do we increase the amount of minerals in the soil
Add water, add fertilises
What is potassium for
Making the enzymes in respiration and photosynthesis work
Lack of it causes the plant to go hello
Nitrogen in plants
To make protein. Lack of it stunted growth and yellow colour
Phosphorous
Photosynthesis
Helping the plant use glucose for respiration
Lack of it causes poor root growth and purple young leaves
Calcium
Strengthen cell wall and plant cell divide
What is the male sex cell in plants
Pollen
What is the male sex organ in plants
Stamen - anther and filament
