Plant Biology Yr9 Flashcards
What do plants need for germination
Oxygen
Warmth
Water
What does germination involve
Breaking open if the seed coat and the development of structures that will eventually become the stem and roof of the plant
What is germination controlled by
Enzymes
Why is water needed in germination
Let’s the seed swell and the embryo to start to grow
What is oxygen needed for in germination
For the aerobic respiration
What is warmth needed for in the germination
Increase growth rate and enzyme activity
What do plants need to grow like animals
Vitamins and minerals
Why do plants need calcium
To build cell walls
Why do plants need magnesium to grow
For chlorophyll formation
Why do plants need nitrogen to grow
For amino acid and protein formation
What happens to leaves in the plant if there is no nitrogen
Yellow/green leaves and weak steam
What happens in the plant if there is no potassium
Poor flower no fruit growth
What happens to leaves in the plant if there is no magnesium
Leaves turn yellow from bottom upwards
What happens to leaves in the plant if there is no phosphorus
Poor root growth and purple leaves
Where do plants get minerals from
Plant roots are covered in root hair cells which take in minerals and water from the soil.
How are the root hair cells useful
The root hair cells greatly increase surface area so max amount of minerals and vitamins can be absorbed. Also help anchor plant in the soil.
What are flowers needed for
Reproduction of plant