Biology 2

Biology 2

HideShow resource information

ECOSYSTEM

Collection of different organisms in area together with improtant non living factors such as water supply and temperature

1 of 15

POPULATION

All organisms of a species found in ecosystem form a population

2 of 15

COMMUNITY

Populations of all species found in a ecosystem

3 of 15

HABITAT

Places where specific organisms live

4 of 15

FOOD CHAINS

Show series of feeding relationships at different trophic levels

5 of 15

PYRAMIDS

Numbers: show number of individuals at each trophic level

Biomass: show total dry mass of all individuals with trophic level

Energy: shows amount of energy passing through trophic level over lime

6 of 15

BACTERIA

Denityfing Bacteria : nitrates as energy source + convert to nitrogen gas

Free livoing Nitrogen Fixing: Nitrogen gas to ammonia, to make amino acids and proteins.

Root Nodules Nitrogen Fixing: Ammonia - amino acids and other organic nitrogen containing compounds

Nitryfing Bacteria: Oxidise ammonia to nitrates

7 of 15

POLLUTION

Releasing substances into the environment in amounts that cause harmful effects and which biological processes cannot easily remove. 

8 of 15

DEFORESTATION

Cutting down large areas of forests causes problems like destruction of habitats and global warming.

9 of 15

FOOD TEST

Glucose = Benedicks Solution

BLUE -- BRICK RED

Starch =Iodine

YELLOW -- BLUE/BLACK

Lipids = Emulsion Test (Ethanol + Water)

MILKY

Proteins = Bieuret Reagent

BLUE -- PURPLE

10 of 15

DIFFUSION

The net movement of particles from a region of high concentration to a region of low concentration i.e. down the concentration gradient

11 of 15

OSMOSIS

The net movement of water molecules from an area of high water concentration to an area of low water concentration across a selectively permeable membrane. 

12 of 15

ACTIVE TRANSPORT

The movement of particles against a concentration gradient using energy

13 of 15

PHOTOSYNTHESIS

Water + Carbon Dioxide ----- Glucose + Oxygen

Convert light energy to chemical energy.

14 of 15

LIMITING FACTOR

Any independent variable, increase in whose value leads to increase in value of dependent variable

15 of 15

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »