Biology 5 9B Plant growth Flashcards
What is the equation for photosynthesis?
Water + carbon dioxide (+ light energy) ➡️ glucose + oxygen.
What are the reactants in the photosynthesis equation?
Water + carbon dioxide.
What are the products in photosynthesis?
Glucose + oxygen.
What are needed for photosynthesis to happen?
Light and chlorophyll.
What happens to light during photosynthesis?
The light energy is changed into chemical energy which is stored in the glucose that is made.
Root hair cells group together to form …
Root hair tissue.
How do plants get water?
Water is taken out of the soil by the roots.
How are roots specially adapted to take in a lot of water?
They branch and spread out to absorb water from a large volume of soil. Also, root hair cells have a large surface are to help absorb water quickly.
Which plant cell prevents water loss from leaves?
Guard cell
Which raw material is needed for photosynthesis that enters the leaf through the stomata?
Carbon dioxide.
When does respiration happen in plants?
All the time.
Are you more likely to find stomata on the upper or lower side of a leaf?
.lower
In which part of the plant does photosynthesis happen?
Leaves
Why do plants have roots?
To get water from the soil and for support.
What are all the raw materials for photosynthesis?
Carbon dioxide and water
Describe the movement of gases through stomata during photosynthesis.
Oxygen moving out of the leaf.
Carbon dioxide moving into the leaf.
How is glucose carried around a plant?
Phloem tubes.
In which plant cell does the most photosynthesis happen?
Palisade cell
Where does the water flow up?
The xylem tubes.
What are the xylem tubes made of?
Hollow cells.
Why is water needed?
To keep the plant hydrated.
Mineral salts. - these keep plants healthy.
Stops plants from wilting.
Keeps leaves cool.
What does the carbon dioxide do.
Diffuses into the cells using the stomata which are small holes
Why are the leaves thin?
So the carbon dioxide does not need to go very far before reaching the cells that need it.
When can photosynthesis be sped up?
If the amount of carbon dioxide around the plant is increased.
If there is more light.
How do leaves trap as much sunlight as possible?
They are wide and have a large surface area.
Where are palisade cells?
In the upper surface of leaves.
Where does most photosynthesis occur?
In the palisade cells.
What are palisade cells packed with?
Chloroplasts.
Why are chloroplasts needed for photosynthesis?
They contain chlorophyll which absorbs light energy.
How do plant cells release energy that is stored in glucose?
Aerobic respiration.
What is the word equation for aerobic respiration?
Glucose + oxygen ➡️ carbon dioxide + water (+ energy)
Why do all living this gd need energy?
So they can respire
When do photosynthesis and respiration happen?
Respiration happens all the time.
Photosynthesis only happens when there is light.
What is glucose?
A type of sugar
What is glucose used for?
Respiration
Making other substances that act as stores of energy ( eg starch)
Making new materials for growth.
What is glucose turned into?
Cellulose (this is used for cell walls), fats and proteins.
How do plants make proteins?
Mineral salts called nitrate are needed.
What do phloem tubes carry?
New substances in a plant.
What do new substances in a plant do?
Help to build up a plants biomass.
This is the mass of all the materials in the plants except from water.
How do plants store the food they make?
In the glucose
How do plants store the food they make?
In the glucose
In which weather conditions would the guard cells close the stomata to prevents water loss?
Dry and windy
Which plant cell prevents leaf water loss?
Guard cell
What is photosynthesis ?
A chemical reaction so it has an equation.
