Howard Hughes Medical Institute
Natural Selection and Evolution of Rock Pocket Mouse Populations
Can evolution repeat itself? Scholars analyze amino acid data in two separate populations of mice. They learn that evolution repeats itself, but natural selection prefers some mutations over others in different environments. Analysis...
Howard Hughes Medical Institute
The Molecular Evolution of Gene Birth and Death
More than 90 percent of humans' DNA doesn't code for anything! Scholars watch a presentation as they answer questions relating to gene mutations. They read details, watch videos, and view animations supporting the concepts. The questions...
Howard Hughes Medical Institute
Icefish Blood Adaptations: Viscosity
Most fish freeze to death when the water is too cold, yet some fish live in the Southern Ocean where the water is often below freezing. Scholars use two models representing the blood from most fish versus the blood from Antarctic fish....
Howard Hughes Medical Institute
How Do Fibers Form?
The proteins inside a cell determine the shape of the cell. While most red blood cells have a circular shape, those with sickle cell take the shape of a sickle. This change in shape causes multiple issues in the system. Scholars solve...
Howard Hughes Medical Institute
Population Genetics, Selection, and Evolution
The Hardy-Weinberg principle states that alleles and genotypes remain constant in the absence of evolutionary influences. Scholars complete a simple hands-on activity applying the Hardy-Weinberg principle to sample data. They observe how...
Cold Spring Harbor Laboratory
Living Things Share Common Genes
Everything evolved from a common ancestor, but how did modern plants and animals develop so many more genes? Scholars use an online interactive to learn about the process. They begin to understand common genes with an animation, multiple...
Cold Spring Harbor Laboratory
Some Types of Mutations Are Automatically Repaired
Does natural light damage or repair DNA? Learn the answer discover the scientists who researched the topic with an online interactive. Scholars read through an online animation presenting the content at their own pace. Then, they read...
Cold Spring Harbor Laboratory
RNA Was the First Genetic Molecule
Can organic molecules come from a pre-biotic environment? Stanley Lloyd Miller proved it is possible when exactly the right conditions exist. Learn about his experiment and the other experiments later building off of it that changed the...
Cold Spring Harbor Laboratory
Mutations Are Changes in Genetic Information
A red delicious apple tree with a simple mutation means we now benefit from the existence of golden delicious apples. Learn how simple mutations change genetic information in DNA sequences. Using biographies, videos, and animations,...
College Board
2018 AP® Biology Free-Response Questions
The average AP Biology score dropped in 2018 with the addition of more data tables and graphs. Offer additional practice free-response questions by using the questions from the 2018 AP exam covering phylogenetic trees, cell structure and...
Biology Junction
Mammals
Mammals include more than 4,000 species and represent the most dominant land animals on Earth. Scholars learn about the large variety of mammals, including orders unfamiliar to most. The presentation highlights the characteristics and...
Cold Spring Harbor Laboratory
Evolution Begins with the Inheritance of Gene Variations
Connect Mendelian genetics with Darwinian theories. An interactive lesson lets pupils explore how George Shull used research from other scientists to explore genetic variation. The resource outlines the statistical analysis of genetic...
Cold Spring Harbor Laboratory
Mendelian Laws Apply to Human Beings
Why are so many inherited diseases more prevalent in populations of specified races? Scholars learn about pedigrees and genetics using a reading, an animation, primary sourced letters, a short video, a biography, a guided practice...
Biology Junction
Amphibians
Biologists know of more than 2,300 living species of amphibians. Learn more about the four orders of amphibians with an interesting presentation. It explains the similarities and differences between the thousands of species of...
Biology Junction
Birds
Birds adapted to almost every climate on the planet, from the Arctic to the rain forests. A presentation focused on birds covers their similarities and differences. It starts with their evolution from reptiles, their many physical...
Serendip
Evolution of Fur Color in Mice – Mutation, Environment and Natural Selection
Most species of animals include a variety of fur or hair color, but why? Scholars watch a video about a changing environment for mice. As the rocks around them change hues, different colors of mice begin to thrive. Discussion questions...
Serendip
How Eyes Evolved – Analyzing the Evidence
Octopodes existed for hundreds of thousands of years before humans, yet our eyes share many similarities. Scholars analyze the evidence to determine if the evolution of eyes best fits a homology or analogy model. They discuss the issue...
Howard Hughes Medical Institute
Biodiversity and Evolutionary Trees
Compare what shells look like on the outside with what makes that happen on the inside. Scholars begin by sorting an various seashells by their physical characteristics into phylogenetic trees. They then conduct a DNA comparison of...
Biology Junction
Kingdom: Fungi
Based on DNA, fungi relate more closely to animals than to plants. This new scientific knowledge shifted the world view of scientists and opened up new classifications. Viewers learn about fungi's place in evolution, in the tree of life,...
Biology Junction
Plant Diversity
Ginkgo trees existed for more than 350 million years, and, at this time, only one species still remains. While plant diversity generally increases over geologic time, some interesting exceptions occur. Young scientists learn about plant...
Howard Hughes Medical Institute
Beaks as Tools: Selective Advantage in Changing Environments
How does nature select some adaptations over others? Scholars experiment picking up seeds with two different types of tools simulating beaks. After practicing, they experience a drought where one type of seed suddenly isn't available....
Howard Hughes Medical Institute
Using DNA to Explore Lizard Phylogeny
On the Caribbean islands, lizards expanded into different niches instead of competing for resources. Scholars discuss and learn from experts in a video how scientists prove the theory. They build phylogenetic trees based on appearances...
Howard Hughes Medical Institute
Evolution in Action: Data Analysis
An environmental factor, such as a drought, sometimes speeds up the rate of natural selection. Scholars analyze data on the beaks of birds around the time of the drought. They compare those that survived to those that perished and find...
Howard Hughes Medical Institute
Lactose Intolerance: Fact or Fiction
Around the world, about 2/3 of adult humans are lactose intolerant. Scholars work in small groups to discuss a few statements about lactose intolerance. Then, they watch a video on the topic and readdress each statement. Whole-class...