nat5 biology

• photosynthesis has 2 stages they are

  light reactions and carbon fixation
• species means


  a group of organisms that can interbreed to produce fertile offspring
• biodiversity means


  the degree of variation that exists among all living organisms on earth
• a niche is


  the role an organism plays in a community
• biotic factors can affect the...


  distribution of an ecosystem
• examples of the affect biotic factors have on distribution: predation competition competition for resources competition for light
• quadrats can be used to

  estimate the size of a population
• pitfall traps can be used for

  hint- (C&C)


  catching and counting
• possible error for pitfall traps may include; flood, animals eating animals, number of organisms caught in one trap not representing ecosystem as a whole
• light intensity can be measured using a

  light meter
• temp of soil can be measured using a

  soil themometer
• indicator species are


  species that indicate levels of pollution by their presence or absence
• soil moisture can be measured using a

  moisture meter
• soil PH can be measured using a

  PH meter
• light energy from the sun is trapped by chlorophyll in chloroplasts and is converted into chemical energy
• what is passed onto stage 2 of photosynthesis?

  hydrogen / ATP
• glucose is available for:


  respiration
• starch is available for:


  storage
• cellulose is availa for:


  structural use
• 90% of energy is used on

  • heat
  • movement
  • undigested waste
• the arrows in a food chain shows the flow of..

  energy