Ecology

Question 1

what do we call the organism at each trophic level

Answer 1

tertiary consumer
secondary consumer
primary consumer
producer

Question 2

what does biomass mean

Answer 2

mass of the living organism

Question 3

how much biomass is transferred at each trophic level

Answer 3

10%

Question 4

what are the 3 reasons not all biomass is transferred

Answer 4

1. organisms don’t normally eat every part
2. some eaten parts are not absorbed
3. most of absorbed nutrients are used for respirstion

Question 5

what is the main source of energy for most communities of living organisms

Answer 5

sun light

Question 6

how much energy from light is used for photosynthesis?

where is this energy stored

Answer 6

1%

substances that make up the cells of the plant

Question 7

what are the 4 organisms involved in the carbon cycle

Answer 7

plants
animals
microorganisms
fossil fuels

Question 8

how do each of these organisms return carbon back into the atmosphere

Answer 8

plants- respiration

animals- respiration

microorganisms- respiration through decay

fossil fuels- being burnt

Question 9

what is the carbon cycle in 5 steps

Answer 9

1. plants photosynthesise to take carbon from the atmosphere and respire to return it
2. animals eat the plants then respire to release the carbon back into the atmosphere
3. when plants and animals die they decay by microorganisms which release carbon as a product of respiration
4. if decay occurs in anaerobic conditions animals and plants are slowly converted into fossil fuels
5. fossil fuels are burnt to release carbon back into the atmosphere