Describes the two organisms capable of photosynthesis in an ocean ecosystem, the different ocean zones and the plants and animals that live in them, some facts about the ocean, and the five oceans of the world.

Explains what thermoplastics and thermosets are, their properties, and their advantages and disadvantages. Provides lots of examples for each of how they are used in everyday life.

Discusses the different types of bacteria with probiotic properties that are beneficial to humans' health. Also discusses bacteria that benefit water, soil, and plants.

Describes the four broad categories of human races in the world, their geographical origins, and their sub-types. Also discusses the difficulties of tracing all branches of a race throughout human history, which is even more so today...

Explains the processes of photosynthesis and cellular respiration in plants. Discusses light-dependent and light-independent reactions in photosynthesis, and glycolysis and aerobic respiration in cellular respiration. The differences...

Learn about the complex structures inside cells and what their functions are.

Describes anatomical features of a spider, including its external structure, eyes, mouth parts, digestive system, circulatory system, respiratory system, nervous system, reproductive system, and its spinnerets.

Describes the steps for making a model of a plant cell in two different ways. The first way uses mostly sweet foods and the second way uses a shoebox, clay, and simple materials.

Describes the steps in how to make a model of a plant cell using simple materials and sweet foods like jello and candy.

Provides a simple definition and description of photosynthesis in plants and explains why photosynthesis is so vital for all living organisms.

Nitrogen is essential to all living things. This article explains what the nitrogen cycle is and the five steps involved in it.

The electron transport chain plays an important role in cellular respiration and photosynthesis and provides a biochemical pathway for the generation of ATP. The process is described here.

Explains the structure of DNA and the seven steps that take place during DNA replication. Includes a labeled illustration for each step.

Brief descriptions of four complex methods of DNA profiling in plants. Some advantages of DNA fingerprinting are also listed.

Explains what vascular plants are and the characteristics of seedless vascular plants. Gives detailed descriptions of whisk ferns, club mosses, horsetails, and ferns.

Presents lots of interesting facts and information about fungi.

Discusses Lamarck's theory of evolution, which was developed before Charles Darwin's own theory, and how it fared over time. The core ideas in Lamarck's theory are described and his theory and Darwin's are compared. Lamarck's ideas...

Describes the three types of anaerobic bacteria and examples within each category.

Discusses examples of probiotic bacteria that benefit the human body and some that help the environment.

Learn about gram staining and the characteristics of gram-negative bacteria. A discussion of cell wall structure is accompanied by a labeled illustration. Includes a list of examples of gram-negative bacteria organized by subgroup....

Describes the characteristics of archaebacteria, the different subgroups, and the importance of archaebacteria.

Explains how bacteria are classified by gram staining for medical purposes, and how they are classified by scientists based on Bergy's Manual of Systematic Classification. Also presents a list of hundreds of bacteria organized into their...

Discusses the different criteria used to classify bacteria and the groups of bacteria within each category. Groups are organized by characteristics such as morphology, shape, cell wall structure, and presence of flagella.

Presents examples of eubacteria along with descriptions.