Mitosis and Meiosis - Comparison Chart, Video and Pictures Cells divide and reproduce in two ways: mitosis and meiosis. Mitosis is a process of cell division that results in two genetically identical daughter cells developing from a single parent cell. Meiosis, on the other hand, is the division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each possessing half the number of chromosomes of the original cell. Biology Study Guides - SparkNotes Home → SparkNotes → Biology Study Guides Biology Subjects
Human body The study of the human body involves anatomy, physiology, histology and embryology. The body varies anatomically in known ways. Physiology focuses on the systems and organs of the human body and their functions. Many systems and mechanisms interact in order to maintain homeostasis, with safe levels of substances such as sugar and oxygen in the blood. The body is studied by health professionals, physiologists, anatomists, and by artists to assist them in their work. Active and Passive Transport Active and passive transport are biological processes that move oxygen, water and nutrients into cells and remove waste products. Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration. On the other hand, passive trasport moves biochemicals from areas of high concentration to areas of low concentration; so it does not require energy. Process There are two types of active transport: primary and secondary.
Explore, Play, Discover: Websites, Activities & More Search form Search Low-cost, teacher-tested activities for the classroom and the curious. BirdGuides – Android-appar på Google Play The BirdGuides app offers specially designed access to the latest UK and Ireland bird news and photos from BirdGuides.com. Quickly and easily find what scarce and rare birds are near you, or enjoy the latest wonderful photos from our contributors. You can also upload your sightings to us, and we'll share the data with the British Trust for Ornithology (registration required). The BirdGuides app is free to download and use; if you have a Bird News Anywhere subscription you'll also be able to access extra details for sightings and set filters to tailor your news to fit your needs. A subscription can be bought via BirdGuides.com.
Plant Cell vs Animal Cell Plant and animal cells have several differences and similarities. For example, animal cells do not have a cell wall or chloroplasts but plant cells do. Animal cells are round and irregular in shape while plant cells have fixed, rectangular shapes. Plant and animal cells are both eukaryotic cells, so they have several features in common, such as the presence of a cell membrane, and cell organelles, like the nucleus, mitochondria and endoplasmic reticulum. Chloroplasts AP Biology Teaching & Learning Resources Welcome! Here you will find copies of most of the labs and activities that we perform in class. Some are only available from the AP Lab book, so I cannot post those online. Anatomy & Phyiology The Effects of Stimulants & Depressants on Heart RateThis is a wonderful lab developed by Paula Donham (Olathe East High School, Kansas).
Bird Guide Share: Website: birdguides.comApple App: App: play.google.com/store/apps/details?id=com.birdguides.birdguidesDescription: Find out much more about birds in the UK and Ireland with this great site and apps. The Apple and Android apps are easy to use and will help you explore the wildlife all around you.Category: Science > Biology, Animals, Plant & Other Living Things
Eukaryotic Cell vs Prokaryotic Cell The distinction between prokaryotes and eukaryotes is considered to be the most important distinction among groups of organisms. Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA. Prokaryotes were the only form of life on Earth for millions of years until more complicated eukaryotic cells came into being through the process of evolution. Definition of eukaryotes and prokaryotes Student & Teacher Resources (Starfish) Starfish As an island nation, many New Zealanders have strong connections with the sea. Whether swimming, surfing, lying on the beach, exploring the rocky shore or fishing, the ocean plays a huge role in our national identity. Commercially, our fisheries earn the country more than $1.3 billion annually – fishing is one of our key primary industries.
Why do blood types matter? - Natalie S. Hodge As with most topics in human genetics, blood type is more complicated than it appears on the surface. There are other human blood groups that are less common than the ABO blood group. For example, the Bombay Phenotype is a recessive condition in which the precursor of the A or B antigen, the H antigen, is not made. DNA vs RNA DNA, or deoxyribonucleic acid, is like a blueprint of biological guidelines that a living organism must follow to exist and remain functional. RNA, or ribonucleic acid, helps carry out this blueprint's guidelines. Of the two, RNA is more versatile than DNA, capable of performing numerous, diverse tasks in an organism, but DNA is more stable and holds more complex information for longer periods of time. Structure
Nature of Science Teaching Activities / Nature of science / Home - Science Online The Nature of Science strand is described in the science learning area as the overarching and unifying strand. How might this influence our teaching and our choice of teaching activities? What teaching activities will help us teach the nature of science? The teaching activities in this section provide examples for how we might adapt other activities to meet the aims of the Nature of Science strand.