Biology:
This is the study of life and reaches from the global scale of the entire planet down to the microscopic world of cells and molecules. Biologists divide the different levels of organization from very large scale to very small scale.
Biosphere: this consists of all the parts of the planet that are inhabited by living things. The biosphere consists of most regions of land; most bodies of water, and the atmosphere. Looking at the interactions of all organisms and the biosphere.
Ecosystems: this is the community of living things in an area, along with the nonliving features of the environment that support the living community. The Earth's ecosystems vary widely, each has a different community of living things and different nonliving features. All of Earth's ecosystems combined make up the biosphere.
Organisms: these are all individual living things; plants, animals, insects, and microbes. Interactions among the organisms of a community make each ecosystem a constantly changing place.
Cells: are life's basic units of structure and function. All organisms are made of one or more cells.
DNA and Genes: DNA is the chemical responsible for inheritance, the passing on of traits from parent organism to offspring. A DNA molecule contains the instructions for a cell to make all the other molecules it needs to function. Along the length of each DNA molecule are units of inherited information called genes.
From such molecular machinery of cells on up to the workings of the whole biosphere, biology explores life at its many levels.
Assignments | Notes |
Textbook  |
