Match the following. 1. biosphere The zone or layer of air, land, and water at the earth's surface occupied by living things 2. inventory All the living things of a particular kind so few in number that they are threatened with extinction 3. transect Organisms that once lived on earth but all of their kind have died out; a dead species 4. endangered species In ecology, a list with numbers of all the names of plants and animals seen in some community or region 5. quadrat A sampling plot used to study and analyze plants and animals 6. extinct A sampling technique used to study and analyze plants and animals using a long, narrow plot or line