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Brain-eating amoebas (Naegleria fowleri) are found in warm freshwater pools around the world, feeding on bacteria. If someone swims in one of these pools and gets water up their nose, the amoeba heads for the brain in search of a meal. Once there, it starts to destroy tissue by ingesting cells and releasing proteins that make other cells disintegrate.

Discover more types of non-Mendelian inheritance such as incomplete dominance and codominance with the Amoeba Sisters! This video uses vocabulary that was previously defined in the Amoeba Sisters Monohybrid Crosses video.

The Amoeba Sisters tour through the biological levels of organization starting with cells and ending with the biosphere!

Last month, researchers announced they were studying a 30,000-year-old giant virus called Mollivirus sibericum that they found in melted Siberian permafrost. The virus was functional and able to infect amoeba. This isn't the first time researchers have found big viruses that have challenged what we thought we knew about the tiny invaders. Mimivirus, discovered in 2003, has 1,200 genes and is twice the width of traditional viruses.

Discover natural selection as a mechanism of evolution with the Amoeba Sisters. This video also uncovers the relationship of natural selection and antibiotic resistance in bacteria.

The Amoeba Sisters explain enzymes and how they interact with their substrates. Vocabulary covered includes active site, induced fit, coenzyme, and cofactor. Also the importance of ideal pH and temperatures for enzymes are discussed.

Explore some examples of specialized plant and animal cells with the Amoeba Sisters! This video explains how specialized cell structure suits their function.

Explore some properties of water with the Amoeba Sisters! It's all about those hydrogen bonds. Terms discussed include adhesion, cohesion, surface tension, specific heat - all made possible by those amazing hydrogen bonds.

Discover natural selection as a mechanism of evolution with the Amoeba Sisters. This video also uncovers the relationship of natural selection and antibiotic resistance in bacteria.

This is the updated Amoeba Sisters human organ systems video, which provides a brief introduction to each of the 11 human organ systems including the circulatory, digestive, endocrine, excretory, integumentary, lymphatic/immune, muscular, nervous, reproductive, respiratory, and skeletal systems.

Explore food chains, food webs, energy pyramids, and the power of biodiversity in this ecology video by the Amoeba Sisters! This video also introduces general vocabulary for the unit of ecology.

Learn the steps to completing a dihybrid cross! This video will show how to set up everyone's favorite 16 square Punnett square. This video uses vocabulary that was previously defined in the Amoeba Sisters Monohybrid Crosses video.

Explore inheritance when carried on the X chromosome with the Amoeba Sisters!

The Amoeba Sisters discuss gene and chromosome mutations and explore the significance of these changes.

Explore gene regulation with the Amoeba Sisters, including the fascinating Lac Operon found in bacteria! Learn how genes can be turned "on" and "off" and why this is essential for cellular function.

Learn how to set up and solve a genetic problem involving multiple alleles using ABO blood types as an example! The Amoeba Sisters walk you through the different phenotypes/genotypes of ABO blood types and how to solve these problems using a Punnett square.

Join the Amoeba Sisters in discovering how to use a dichotomous key to identify organisms. This video also touches on the importance of scientific names.

Compare and contrast prokaryote and eukaryote cells with the Amoeba Sisters!

Explore how ATP is made in 3 steps of aerobic cellular respiration with the Amoeba Sisters! This also compares this process to photosynthesis and introduces ATP structure. Most importantly, learn why all of this matters to you!

JoAnn Burkholder and her associates at North Carolina State University were the pioneer investigators in the Pfiesteria research, which our group of Old Dominion colleagues has since pursued. Burkholder was the first scientist to link the 1991 fish deaths to Pfiesteria, based on her team's on-site investigations and controlled laboratory studies. In addition, she observed a complicated life cycle in the organism, including numerous morphological forms such as motile flagellated cells, amoebae and cysts that are able to survive in the sediment of estuaries until activated by the presence of fish to produce toxic motile cells.