2016-12-04T11:02:50ZTake the biome quiz and test your knowledge of the land biomes of the world.
2016-12-04T11:02:50ZThis meiosis animation illustrates the different phases of meiosis I and compares them to phases in mitosis.
2016-12-04T11:02:50ZTest your knowledge of meiosis. Take the Meiosis Quiz.
2016-12-04T11:02:50ZA virus is a microscopic agent of disease that has characteristics of both life and non-life. Discover 7 interesting facts about viruses.
2016-12-04T11:02:50ZBiology prefixes and suffixes help us to understand science terms. The affix (troph) refers to nourishment. Myotrophy refers to muscle nourishment.
2016-12-04T11:02:50ZB cells are immune cells that provide protection against germs through the production of antibodies. These cells provide long lasting protection against specific pathogens and disease.
2016-12-04T11:02:50ZTake the Plant Cell Quiz and find out how much you know about plant cells and tissues.
2016-12-04T11:02:50ZThis mitosis animation illustrates the different phases of mitosis in a plant cell.
2016-12-04T11:02:50ZMacrophages play an important role in the immune system by protecting the body from infectious agents. These white blood cells engulf and digest pathogens and cellular refuse, clearing the body of harmful substances.
2016-12-04T11:02:50ZSister chromatids are two identical copies of a single replicated chromosome that are connected by a centromere and held together by special proteins.