Ichthyologists study fish. Fish and wildlife biologists study and manage the wildlife, especially game species for hunters and fishermen. At a Nursery. In a hospital a nursery is where new babies stay until they go home with their parents. People who work in nurseries grow new trees, shrubs and other plants.
Trees start from seeds grown in seedbeds, sometimes in a special glass house called a greenhouse.
Some trees and shrubs are grown from cuttings. Cuttings are small pieces of a branch from a tree or shrub that are used to grow new trees and shrubs. Many people have jobs in the timber industry. They harvest trees to make wood products and paper. People then plant new trees to take the place of the ones that they cut down.