Incomplete dominance is a type of inheritance in which one allele for a specific trait is not completely dominant over the other allele. This results in a combined phenotype (expressed ... Read More

There are two main types of circulatory systems in higher organisms: open and closed circulatory systems. In an open circulatory system, blood mixes with internal organs directly. Organisms ... Read More

Researchers have determined that high levels of nutrients from agricultural activities are contributing to the increased incidence of frog deformities in North America. These nutrients facilitate growth in a certain species ... Read More

Papillomavirus Credit: Linda M. Stannard, University of Cape Town Scientists have long sought to uncover the structure and function of viruses. Viruses are unique in that they have ... Read More

Muscle Cell Mitochondria © Dennis Kunkel Researchers have discovered two genes that play a role in prolonging life. These genes kick into high gear when the amount of ... Read More

The brain is one of the largest and most important organs of the human body. This organ has a wide range of responsibilities. From coordinating our movement to managing our ... Read More

Photo Credit: Donna Garde, Texas Parks & Wildlife Visitors to Lake Tawakoni State Park in Texas were stunned and amazed when they saw a colossal spider web covering ... Read More

Microsporocyte in Prophase II © John C. Glase Meiosis is a two-part cell division process in organisms that sexually reproduce. In prophase II of meiosis, the nuclear membrane ... Read More

Science fair projects give you the opportunity to experience science and biology through hands-on activities. Some students however, find it difficult getting started on a project. So where do you ... Read More

One of the keys to being successful in biology is being able to understand the terminology. Difficult biology words and terms can be made easy to understand by becoming familiar ... Read More

As a plant matures, its cells become specialized in order to perform certain functions necessary for survival. Some plant cells synthesize and store organic products, while others help to transport nutrients ... Read More

Life is both wonderful and majestic. Yet for all of its majesty, all organisms are composed of the fundamental unit of life, the cell. There are two primary types of cells: ... Read More

Macromolecules are polymers. Polymers are large molecules of many similar "units" linked together. These individual units are called monomers. When small organic molecules such as amino acids are joined together, ... Read More