B18 :Biodiversity and Ecosystems Flashcards
1
Q
what is biodiversity
A
a measure of the variety of all the different species of organisms on Earth, or within a particular ecosytem.
2
Q
how does biodiversity ensure the stability of ecosystems
A
-reduces dependence of one species on another for food, shelter and environment
3
Q
why has the human population grown so fast
A
-we can cure killer diseases
-we have no natural predators
-we can grow more food than gathered in the wild
4
Q
how do humans use the land
A
-urban areas
-farming
-mining
-landfill and pollution
5
Q
how can land be polluted
A
