Ecosystems Flashcards
State what a food chain is
A food chain is a diagram that shows the transfer of energy between organisms.
Sate the difference between a predator and a prey organism
A predator eats other animals. The prey is eaten by other animals
State what a food web is
Linked food chains
State one organism that is needed to pollinate food crops
Bees
State what happens to the population of consumers if the population of the producer decreases.
There will be less consumers since they interdepend on the producers
State what is meant by bioaccumulation
Where chemicals are passed through the food chain or web
State what is meant by an ecosystem.
A name given to plants and animals if they live in a particular habitat.
State what is meant by a habitat
An area in which organisms live
State what is meant by a niche
A particular role an organism has in an ecosystem
State four resources that animals compete for
Food
Water
Territory
Mates
State four resources that plants compete for.
Light
Water
Space
Minerals
State what is meant by interdependence
When organisms depend on each other for survival
State why flowers have petals
They are normally brightly coloured to attracted insects
State where pollen is made
Anther
State three ways pollen can be transferred between plants
Wind, insects or other animals
State what nectar is
A sweet sugary fluid that is used to make honey
State what happens during fertilisation in plants
Pollen goes down the pollen tube and fertilises the ovule.
Name three parts of the flower that becomes fruit
Ovary
State three things needs for germination
Water
Oxygen
Warmth
Name four methods of seed dispersal
Wind
Animal
Water
Explosive
Name two types of seeds dispersed by animals.
Goose grass and burdock
Describe the structure of a seed that can be transported by water
Small mass
Float on water
Woody fruits
Waterproof
Name a plant that disperses its seeds by explosion
Pea pods
