Describes what cytoplasm is and its functions in regulating cellular processes.

Describes the characteristics of the bacteria Spirillum, its shape and size, habitat, growth, method of storing nutrients, and facts about different species.

Describes the characteristics of Archaea, Bacteria, and Eukarya, the three domains of life.

What are bacteria? Learn about the parts of a bacteria cell, bacteria and human health, and other fun facts.

A brief essay about older and more recent ideas on when the first cells evolved. Good coverage of different scientific theories about the origin of life.

Take this 32 question quiz on control of gene expression. The quiz is multiple choice.

This exercise is to introduce you to the kinds of cells that make up all living systems, and to contrast cells with viruses. At the end you can test your understanding of these topics by taking a short test.

This lesson presents the organizational categories of living things. It is 3 of 3 in the series titled "Three Domains/ Five Kingdoms /Taxonomy."

This lesson presents the organizational categories of living things. It is 2 of 3 in the series titled "Three Domains/ Five Kingdoms /Taxonomy."

[Free Registration/Login may be required to access all resource tools.] Summarizes the key points about the evolution of eukaryotic cells into multicellular life forms. Includes a few questions to check for understanding.

Brief description of all the organelles.

An article reviewing the structure of eukaryotic cells. Learn how the cells have a nucleus, organelles, and chromosomes.

Article takes an in-depth look at the structure and function of the plasma membrane and cytoplasm of cells, the phospholipid bilayer, and microvilli.

Discussion in detail of the structure and function of the nucleus and ribosomes of a cell and how they work together in the production of proteins.

This is a five-question quiz relating to signaling in staphylococcal Toxic Shock Syndrome.

Read the passage and study the graphics about Cefoxitin disk diffusion versus mecA PCR for MRSA detection, and then complete the five-question quiz.