B4 Flashcards
What is a Habitat?
Where a plant or animal lives
What is a good BIODIVERSITY?
An area has a large variety of plants and animals
How do you measure the distribution of organisms?
Using a TRANSECT LINE
How do you use a TRANSECT LINE?
A long length of string is laid across an area. At regular intervals the organisms in a square frame called a QUADRAT can be counted (for animals) or assessed for percentage cover.
How can the data from the TRANSECT LINE be shown?
In a KITE DIAGRAM
What is an ARTIFICIAL ECOSYSTEM?
Where humans deliberately keep and protect ONLY ONE species (such as salmon in a fish farm) and remove other organisms that would compete with it and lower the yield.
What is ZONEATION?
The distribution of organisms.
What is the CAPTURE-RECAPTURE method
////////read up on it in revision guide////////
How to calculate population size?
number in 1st sample X number in 2nd sample
____________________________________
number in 2nd sample previously marked
////////read up in revision guide////////
A word equation for photosynthesis?
6Carbon Dioxide + 6Water = Glucose + 6Oxygen
Symbol for GLUCOSE?
C H O
6 12 6
In plants what is glucose used for?
Used in RESPIRATION - releasing energy
Converted into CELLULOSE - to make cell walls
Converted into PROTEINS - for growth and repair
Converted into STARCH - fats and oils for storage
Why is STARCH used for storage?
It is INSOLUBLE
How many stages in PHOTOSYNTHESIS?
It is a TWO stage process
What are the two stages in PHOTOSYNTHESIS?
- Water is split up by light energy releasing Oxygen gas and Hydrogen ions
- Carbon Dioxide gas combines with the Hydrogen to produce glucose and water
What increases the rate of PHOTOSYNTHESIS?
More Carbon Dioxide
More light
Higher temperature for enzyme action
Leaves are adapted so PHOTOSYNTHESIS is very…
…EFFIICIENT
Leaves are usually broad so they have a large surface area so…
…they can get as much light as possible
Leaves are usually thin so…
…gases can DIFFUSE through easily and light can get to all the cells
They contain CHLOROPHYLL and other pigments so…
…they can use light from a broad range of the light spectrum
They contain specialised guard cells which control the opening and closing of the _______ therefor regulating the flow of Carbon Dioxide and Oxygen as well as water loss
Stomata
REVISE THE STRUCTURE OF A LEAF
IN REVISION GUIDE
What is DIFFUSION?
The movement of partials in a gas or liquid from an area of high concentration to an area of low concentration.
The rate of DIFFUSION can be increased by.
3 points
- a shorter distance for the molecules to travel
- a steeper concentration gradient ( a greater difference in concentration between the two areas)
- a greater surface area for the molecules to DIFFUSE from or into
What is OSMOSIS?
The movement of water across a SEMI-PERMEABLE MEMBRANE from an area of high water concentration to an area of low concentration
