Plants Flashcards
What is biodiversity?
The variety that exists among living things.
What is an organism?
A self contained living thing.
What is a habitat?
The place where an organism lives.
Give examples of areas of high biodiversity
- Coral reef
- Rainforest
Give examples of areas of low biodiversity
- Desert
- Arctic Tundra
State 4 “Threats” to biodiversity.
- Deforestation
- Pollution
- Climate Change
- Over-exploitation
State 4 ways we can improve biodiversity.
- Reforestation
- Protect natural habitats
- Rewilding
- Promote sustainable land use
List the “Sampling techniques” that scientists can use to monitor a population.
- Quadrats
- Pitfall traps
- Camera traps
- Tree beating
Give 2 examples of a “medicinal use” of a plant
- Willow bark - used to make Asprin
- Opium poppy - used to make morphine
Give 2 examples of a “clothing use” of a plant
- Cotton - cotton seeds are used to make a wide range of fabrics.
- Flax - flax fibres are used to make Linen fabric.
Give 2 examples of a “construction use” of a plant
- Pine - used to make ship’s masts
- Oak - used for structual timber in buildings
What is meant by “Photosynthesis” ?
The process used by plants to produce simple sugars (glucose).
In which part of a leaf cell does Photosynthesis occur?
The Chloroplasts
Which chemical is present within the chloroplasts that is needed for photosynthesis?
Chlorophyll.
What are the “Reactants” of Photosynthesis?
Carbon dioxide & water
What are the “Products” of Photosynthesis?
Glucose & oxygen
What is the source of the energy required for Photodynthesis?
The Sun
What are the “limiting factors” of Photosynthesis?
- Light level
- Carbon dioxide concentration
- Temperature
What is meant by “Starch” ?
A long chain of sugars that a plant uses to store energy.
What is the chemical “test” for starch ?
Starch turns iodine from pale brown to blue-black.
What are the top 5 main food crops globally?
- Corn/maize
- Wheat
- Rice
- Potatoes
- Cassava
What are the 4 main causes of hunger globally?
- Poverty
- Food shortages/seasonal hunger
- War & Conflicts
- Climate change
What are the 3 essential nutrients required for plant growth?
- Nitrogen - used for leaf and stem growth.
- Phosphorus - used for root growth, flowering and fruiting.
- Potassium - used for plant health & disease resistance.
What is meant by a “Fertiliser” ?
A substance that is applied to a crop to increase its yield by providing essential nutrients.
