1.
the study and description of living things, especially their behavior and how they relate to one another
2.
the study and description of the natural world, including minerals and fossils
3.
the natural phenomena, especially plants and animals, of a particular time or place
4.
the natural development of something such as an organism or a disease over a period of time
5.
a written account of a particular aspect of the natural world
6.
the study of living things and their natural environments
1.
the study and description of living things, especially their behavior and how they relate to one another
2.
the study and description of the natural world, including minerals and fossils
3.
the natural phenomena, especially plants and animals, of a particular time or place
4.
the natural development of something such as an organism or a disease over a period of time
5.
a written account of a particular aspect of the natural world
6.
the study of living things and their natural environments