Describes the structure of bacteria, where bacteria can be found, and how they are classified using gram staining. Includes lists of bacteria organized by gram staining response and whether they have a capsule shape. Also includes a list...

Explains what stabilizing selection is and how this type of natural selection actually limits genetic diversity in a population. Presents examples of stabilizing selection in different plants and animals.

Some types of both beneficial and harmful bacteria are identified and described. States characteristics, where each is found, and their benefits or the diseases that they cause.

Describes five different types of hormones that regulate plant processes - auxins, cytokinins, ethylene, abscisic acid, and gibberellins.

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

Presents labeled illustrations of a plant cell and an animal cell which demonstrate the parts that are common and different. Next is a table listing cell organelles and stating whether each is present or absent in a plant or animal cell....

Describes the parts of a seed and the stages in its germination. Has a few embedded ads.

Explains how asexual reproduction takes place and gives examples of organisms within different taxonomical kingdoms that reproduce in this way, as well as others that reproduce both asexually and sexually.

The taxonomic classification of the earthworm is described and its anatomical characteristics.

Characteristics of roundworms, an intestinal parasite, are described, including anatomy, reproduction, habitat, and what happens when a human is infected by them.

Describes roundworm characteristics, including their classification, habitat, reproduction, infection of humans and pets, and how they are transmitted to other hosts. Includes some examples and the diseases they cause.

Discusses the functions of chromosomes, features of their structure, and different types of chromosomes.

Discusses the general characteristics of protozoa and how they can be divided into different types based on their mode of locomotion, mode of nutrition, or mode of respiration. Includes a list of facts about protozoa.

Describes the characteristics and anatomy of organisms in the phylum Platyhelminthes.

Explains how chloroplasts evolved into their present form, how photosynthesis takes place in them, where they are found in plants, physical characteristics, and other functions they perform.

Presents four simple techniques for extracting chlorophyll from leaves.

This resource describes the structure and functions of the cell membrane.

Describes the composition of cytoplasm, its functions, the cell organelles suspended in it and what their functions are, and lots of other information about this vital cell component.

Describes the physical characteristics of June bugs and their life cycle, and provides many other facts about these beetles.

Describes the characteristics of cocci bacteria, their shape, how they arrange themselves in pairs and groups, common forms of cocci, their method of reproduction, and types of cocci that cause diseases in humans. Includes examples of...

Explains what synapomorphy is by using examples to demonstrate the concept, which plays an important role in the system of cladistics.

Clearly presents the steps in meiosis and mitosis with each step accompanied by an illustrated fact card.

The equation for cellular respiration is given and a diagram is provided that illustrates the process with glycolysis, the Krebs cycle, and the electron transport chain shown. Each of these steps is explained and a summary of the total...

Somatic cells are any cells that are not involved in reproduction and thus cannot be passed on to offspring. This resource discusses mutations in somatic cells, how they occur, how they are detected, and the diseases they can cause in...