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This page contains content imported from the introduction of the Wikijunior biology textbook at Wikibooks. The content here is available under the CC-by-SA license. The full list of editors who contributed to this content can be found here.

This page, imported from Wikibooks, is intended to demonstrate the functionality of the HTML Tags extension, which supports the use of LRMI, a metadata framework for describing online educational resources. The extension can also support most other metadata schemas, but this installation is currently set to only the terms found in LRMI's specification, including the terms mentioned. The two easiest ways to add LRMI data to articles in it is either to use the LRMI button added to every page, or just add the {{LRMI-object}} template manually. Feel free to mess around in the demo wiki if you're curious about it.

Biology is the study of Life. It helps us understand many things, such as how our body works, how our body keeps warm, and what we are made of. Biology is very important to know. Some subjects in Biology are Genetics, Zoology, Botany, and Ecology.

A Biologist is someone who studies Biology.

What is life?[edit]

Living things are different from things that are not alive. It is usually easy to tell what is living and what is not, except with really small "microscopic" life forms and colorless, lifeless-looking mosses.

Here are some properties of living things. Some non-living things can have some of these properties.

Living things can change and grow. However, volcanoes also change and grow.
Living things can move. However, the wind is moving air, and water always moves downhill.
You probably want to know how plants can move. They can grow, and sometimes move more rapidly than that, in response to things such as the sun or water. One example is that sunflowers will turn during the course of the day so that they are always facing the sun. Another example is that if a plant gets tipped over, it will want to turn upwards.
Living things can reproduce. That is they can produce copies of themselves, over and over. This is the most important difference between living and non-living things.
In order to reproduce, living things need nutrition, that is chemicals and energy sources in order to assemble the materials needed to reproduce themselves. In this process , living things must excrete waste. Waste is material which is of no use, or harmful.

Animals, bacteria, and plants are examples of living things. Rivers, mountains, oceans, and soil are examples of non-living things, but often they are homes for living things.

Cars and tables are not living things because they cannot reproduce themselves.

Levels of Life[edit]

Living things can be many sizes. Also, biologists organize the structures and groupings of living creatures according to size. A living creature is called an organism. Organisms can consist of single cells or multiple different types of cells grouped into tissues and organs. From small to large, these are how living things are grouped.

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