Group items tagged

This explains the techniques and the virtual simulation allows interactive practive

Population simulation involving predator and prey

In their study of the medium ground finches, evolutionary biologists Peter and Rosemary Grant were able to track the evolution of beak size twice in an amazingly short period of time due to two major droughts that occurred in the 1970s and 1980s. This activity simulates the food availability during these droughts and demonstrates how rapidly natural selection can act when the environment changes. Students use two different types of tools to represent different beak types to see which is best adapted to collect and "eat" seeds of different sizes. Students collect and analyze data and draw conclusions about traits that offer a selective advantage under different environmental conditions. They have the option of using an Excel spreadsheet to calculate different descriptive statistics and interpret graphs.

simulation of natural selection 

This hands-on activity, used in conjunction with the film The Making of the Fittest: Natural Selection in Humans, teaches students about population genetics, the Hardy-Weinberg principle, and how natural selection alters the frequency distribution of heritable traits. It uses simple simulations to illustrate these complex concepts and includes exercises such as calculating allele and genotype frequencies, graphing and interpretation of data, and designing experiments to reinforce key concepts in population genetics.

SciGuides are a collection of thematically aligned lesson plans, simulations, and web-based resources for teachers to use with their students centered on standards-aligned science concepts. Human modifications to communities of living organisms in an ecosystem can change the function and processes of that system. The flow of energy through an ecosystem depends upon the diversity of organisms within it; therefore, when this flow is altered, substantial biological and geological changes occur. It is important that our students not only realize that when a local ecosystem is destroyed or negatively affected by human transformations (building, agriculture, technology); the effect is eventually felt globally. We cannot ignore the fact that everything we do impacts our natural environment. The main question is, "How can we be better "keepers of the Earth"?

The Virtual Biology Lab Project is designed to provide interactive activities that demonstrate ecological principles. We provide agent-based models that simulate classic ecological experiments or concepts across a wide range of ecological topics. Students manipulate experimental parameters and observe the results. These results are provided numerically and graphically and are reinforced with a visualization of the model's "world". The content is suitable for advanced high-school and college students.

The video explains how Clinical Pharmacology can help to deliver the right dose for every patient by combining clinical trials data and modeling & simulation approaches during drug development.

In this case study, students will have the opportunity to model the spread of tuberculosis and development of antibiotic resistance in a hypothetical prison environment. After reading a brief handout and viewing a short video, students play a simulation game by first identifying a group of prison inmates represented by index cards. The placement of the cards will influence how drug resistance spreads from one inmate to another. Using a dice roll to mimic random probability of infection and antibiotic misuse, students then track the development of resistance to four specific antibiotics, determined by selection of playing card suit. Opportunity for release or transfer on inmates from one facility to another introduces a further level of complexity, allowing students to study resistance spread. This activity was originally designed for a section of an upper-division biology course about antibiotic resistance, but it would also be appropriate for lower-division undergraduate and high school biology courses discussing antibiotic use.

This case study uses an interactive activity to illustrate density dependence in ecology classes. We developed a "hunt" using paper butterflies with warning signals on the upper side of the wings and symbols that indicate if a butterfly is noxious underneath the wings. Butterflies are distributed in four different patches with varying densities of noxious and palatable butterflies, simulating Batesian or Müllerian mimicry. Students can catch as many butterflies they want for a period of time, but if they catch more than three noxious butterflies they are out of the game. After the activity, students calculate the survival rate of each type of butterfly in each patch and discuss the implications of density and warning signals according to their results. Students then answer questions and build graphs using the data from the activity and knowledge from the class and the discussion. With this case study, students will be able to understand negative and positive density dependence, as well as predation, learning, and convergent evolution, while recalling or being introduced to Batesian and Müllerian mimicry.

Online animation and simulations for biotech.

This activity guides the analysis of a published scientific figure from a study that modeled the impact of an infectious fungal disease on a bat population. In 2006, a disease called white-nose syndrome (WNS) began wiping out bat populations in North America. Because many of these bats eat insect pests, the spread of WNS may devastate ecosystems and increase pest control costs. In this study, scientists mathematically modeled the effects of WNS to estimate extinction probabilities for the little brown bat (Myotis lucifugus) population in the northeastern United States. This figure shows these probabilities projected for five annual rates of population decline. Each projection is simulated up to 100 years after WNS emerged in the population. The "Educator Materials" document includes a captioned figure, background information, graph interpretation, and discussion questions. The "Student Handout" includes a captioned figure and background information.

Students can manipulate mutations in bunnies, such as fur color and teeth length. By altering the environmental factors, students can see how the bunny populations change over time. For example, in a warm environment, more bunnies will have brown fur, but in the cold environment, more bunnies will have white fur. The student worksheet includes instructions on how the simulator works. Then students perform a variety of "experiments" to explore mutations in the populations. I include this as part of a unit on evolution, so students are familiar with VIDA charts. Students complete a chart at the end of the activity to summarize how variations in populations lead to adaptation.

National Science Digital Library 

Animated video walks students through a sickle cell anemia case study, guided by a genetic counselor, with breaks for questions and interactive responses.

Lesson with comprehensive links to genetic disorders

Interactive activities

A complete understanding of evolution requires knowledge that spans many biological sub-disciplines. However, students are often taught evolution in the context of ecological systems and isolated from genetic and cellular ones. To address this issue, we have developed case studies that track the evolution of traits from their origination in DNA mutation, to the production of different proteins, to the fixation of alternate macroscopic phenotypes in reproductively isolated populations.

Avida-ED is an award-winning educational application developed at Michigan State University for undergraduate biology courses to help students learn about evolution and scientific method by allowing them to design and perform experiments to test hypotheses about evolutionary mechanisms using evolving digital organisms.