[Free Registration/Login may be required to access all resource tools.] The nucleus is only found in eukaryotic cells. It contains most of the genetic material of the cell. It is surrounded by a double membrane, or nuclear envelope, that...

Learn the basic structure and function of the nucleus, or the control center of a eukaryotic cell.

Take a look at the parts of an atom and learn about its properties.

Self-guided learning activity where students learn about cell structure and function, different types of tissues, and various kinds of membranes in the body. There is a short quiz at the end of the lesson to check for understanding.

Find out if you know enough about atoms to build them. The goal of the activity is to build an atom of a particular element by dragging the correct numbers of neutrons, protons and electrons into the atom.

This site features a clear picture of the plant cell with a concise explanation of its key parts and their functions.

This multi-day lesson plan helps students to understand how the models of the atom have changed and how quantum mechanics affects the electrons as they orbit the nucleus.

Take this 13 question quiz to test your knowledge of the parts of a plant cell. Know vocabulary such as nucleus, chloroplast, and ribosome.

Discusses the discovery of the cell nucleus, its location, size, structure, composition, and functions.

A reference site exploring cell structure. Learn about the structures and functions of the major organelles of the cell. Also included are research questions to better understand the cell.

Site provides extensive information in the study of comets. Includes excellent graphics that depict what comets look like as they travel through the solar system. Also includes information on how comets may have effected the Earth's...

36-page tutorial takes a look at the organization of living cells.

[Free Registration/Login may be required to access all resource tools.] DNA contains the instructions to create proteins, but it does not make proteins itself. DNA is located in the nucleus, which it never leaves, while proteins are made...

Learn about the life of Aage Niels Bohr, and see how his work was pivotal in the development of the theory of the structure of the atomic nucleus.

The parts of a cell nucleus are described along with a list of the functions of a cell nucleus.

Describes plant cells and the structure and function of their different parts.

Through full-color images and concise information, learn about the origin of cells. Discover some of the notable studies surrounding the history of life on Earth.

Dutch version of the well-known "Particle Adventure" physics website that teaches students about atoms, mass, particle physics, and quantum physics. The site discusses theories related to physics and provides other links related to the...

Description of organelles. Links will take you to a glossary with pictures for many of the definitions. Ends with a quiz linked to answers.

The characteristics, structure, and functions of the nucleolus are described.

Provides a labeled diagram of a plant cell and descriptions of the characteristics and functions of many of its organelles.

Lesson plan with subsequent pages to use with the lesson. Images with landform word match up and additional work on earth modeling.

Describes the three types of plant cells and their differences, and the structures within a plant cell and their functions.

This resource is a cellular biology course site with clickable list that provides electron micrographs of various cell organelles and the like.