food chains Flashcards
what do food chains start with?
a producer
where do producers get their food from?
they make their own food using energy from the Sun, synthesise molecules
give an example of a producer
a green plant/algae which makes glucose by photosynthesis
what are the producers for biomass?
photosynthetic organisms
describe the food chain
producer to primary consumer to secondary consumer to tertiary consumer to apex predator
prey
animals that are eaten
predator
animals that kill and eat other animals
biomass
energy stored in a plant
how is energy transferred in an organism?
when organisms eat other organisms
what happens in a stable community to do with predators and prey?
the number of each rise in cycles
why are predator-prey cycles out of phase?
because it takes a while for one population to respond to changes in the other population
