What happens to the amount of biomass transferred from one trophic level to the next in a food chain?
It increases
It decreases
It stays the same
Which type of organism do food chains always start with?
Producer
Herbivore
Primary consumer
Foxes eat rabbits. What will happen to the number of foxes if the number of rabbits increases?
Increases
Decreases
Stays the same
Which of these processes causes biomass to be lost between trophic levels of a food chain?
Photosynthesis
Eating
Respiration
What is mutualism?
When two organisms pair up and both benefit from each other
When one organism in a pair benefits and the other suffers
The transfer of biomass from one organism to another
Which of these is an example of a parasitic relationship?
Headlice feeding on human blood
Oxpecker birds cleaning the skin of buffalo
Bacteria living in root nodules of leguminous plants
What is the percentage energy efficiency of biomass transfer if a cow eats 5 kilograms of grass and has an increase in biomass of 0.5 kilograms?
2.5%
4.5%
10%
Which of these is the correct shape for a pyramid of biomass?
Which of these organisms is an example of a producer?
Worm
Tadpole
Oak tree
If a chicken ate 500 g of corn, but egested 140 g of faeces, excreted 30 g of urine and lost 10 g through respiration, how much biomass did it store?
350 g
320 g
470 g