Animal & Plant Cells Meiosis: An Interactive Animation Diploid Cell (2N): From a preceding mitotic division, the Oogonium (Spermatogonium) enters meiosis with DIPLOID (2N) chromosomes but TETRAPLOID (4N) DNA. Chromosomes then duplicate to produce SISTER CHROMATIDS (or HOMOLOGOUS DYADS). Prophase I: Dyad pairs align to create "TETRADS", non-sister chromatids connect and trade sections at a "CHIASMA", a process called "CROSSING OVER". Metaphase I: SPINDLE FIBERS attach to each dyad at the KINETOCHORE. Anaphase I: Chiasmata break apart and sister chromatids begin migrating toward opposite poles. Telophase I: CLEAVAGE FURROW forms beginning the process of CYTOKINESIS (cell division). Prophase II: Spindle formation begins and centrosomes begin moving toward poles. Metaphase II: Tension from spindle fibers aligns chromosomes at the metaphase plate. Anaphase II: CHROMATIDS separate and begin moving to the poles. Telophase II: CLEAVAGE FURROW forms beginning CYTOKINESIS. Gamete (1N): NUCLEAR ENVELOPES form and chromosomes disperse as CHROMATIN.
Protista Group: The "Catch-All Kingdom" By: Chris Alderman, Michelle Strathy, Katrina Cofield, and Stuart Edwards Introduction Protistans are eukaryotes. They have a nucleus, large ribosomes, mitochondria, endoplasmic reticulum, and golgi bodies. Evolution of the Protista Kingdom Early life on Earth Evolved from bacteria Represent intermediate step in evolution of Three Kingdoms 1. 2. 3. Knowing the Protista Defining the Protista Diverse species, ranging from single cells to giant kelps, that are photoautotrophs, heterotrophs, or both Protists can be heterotrophic or autotrophic Heterotrophic cannot make their own food Autotrophic can survive by making their own food Protists are mostly unicellular (except for multicellular algae) Other protists are all unicellular heterotrophic eukaryotes (except for Fungi) Cell Make-up Prokaryotic vs. Eukaryotic cell Development Endosymbiotic model of Eukaryotic cell evolution Three Types of Protists Animal-like Protists Protists with Pseudopods Amoeba An example of an Amoeba is Entamueba histolytica .
Fighting infection with vaccines - Science (9) - ABC Splash - Overview Explore historical and modern efforts to battle human infectious diseases. Watch re-enactments of the experiments of Edward Jenner, who pioneered vaccination, and of Louis Pasteur's work showing how microbes cause infection. Peer down the microscope to see the microbial world that wreaks havoc on human health. Learn about the work of an Australian team developing a vaccine against the diarrhoea. 13 mins 46 secs Source: Pathways to Australian Science | Learning area: Science | Secondary: Year 9 Transcript 00:00:07:03NARRATOR:Sickness... ...Read more > 00:11:16:20DR RUTH BISHOP:We went looking for the cause of acute gastroenteritis in young children coming into hospital. About this resource Acknowledgements Source: Pathways to Australian Science Date first broadcast: 01 January 1998 Cite this resource You can use this information to reference this item. Bibliographic details for 'Fighting infection with vaccines': Pathways to Australian Science, ' Fighting infection with vaccines', ABC Splash
Kingdom (biology) Prefixes can be added so subkingdom and infrakingdom are the two ranks immediately below kingdom. Superkingdom may be considered as an equivalent of domain or empire or as an independent rank between kingdom and domain or subdomain. In some classification systems the additional rank branch (Latin: ramus) can be inserted between subkingdom and infrakingdom (e.g. Protostomia and Deuterostomia in the classification of Cavalier-Smith). From around the mid-1970s onwards, there was an increasing emphasis on comparisons of genes on the molecular level (initially ribosomal RNA genes) as the primary factor in classification; genetic similarity was stressed over outward appearances and behavior. Taxonomic ranks, including kingdoms, were to be groups of organisms with a common ancestor, whether monophyletic (all descendants of a common ancestor) or paraphyletic (only some descendants of a common ancestor). One hypothesis of eukaryotic relationships, modified from Simpson and Roger (2004).
i-Biology | international, independent, illuminated Plants - Interactive Science Games and Activities plants A plant is a living thing. A plant needs light, warmth, water and nutrients to grow well. Roots take up water and nutrients from the soil. They also keep the plant steady and upright in the soil. The stem carries water and nutrients to different parts of the plant. The leaves make food by using light from the sun, along with carbon dioxide from the air and water. Sats Questions about Plants Self Marking Plants Sats Quiz Sats Questions about Parts of a Plant Mixed Sats Questions
How plants work - Science (4) - ABC Splash - Overview Plants are the only living things that can make their own food. They do this during the day while it's light, using a process called photosynthesis, which uses carbon dioxide and produces oxygen. 5 mins 11 secs Source: Kids in the Garden | Learning area: Science | Primary: Year 4 Transcript 00:00:19:06NICK HARDCASTLE:Mmm! ...Read more > 00:00:36:08VOICE:Yummy! About this resource Acknowledgements Source: Kids in the Garden Date first broadcast: 27 June 2005 Cite this resource You can use this information to reference this item. Bibliographic details for 'How plants work': Kids in the Garden, ' How plants work', ABC Splash abcspla.sh/m/104100 25 April 2014 Copyright information Metadata © Australian Broadcasting Corporation and Education Services Australia Ltd 2012 (except where otherwise indicated).
Anatomy Labs - OnlineLabs.in - Virtual laboratory simulations for science education Below is a list of freely available online anatomy, physiology and virtual dissection lab resources. Get Body Smart – An online examination of human anatomy and physiologyHuman Body & Mind – From the BBCVirtual AutopsyFroguts! – Virtual frog dissection and labsVirtual Frog Dissection Kit – From Berkeley LabVirtual Cat Dissection – From Penn State UniversityVirtual Pig Dissection – From Whitman CollegeVirtual Owl Pellet Dissection – From KidWingsJayDoc HistoWeb – From the University of Kansas Medical Center. The following anatomy and physiology laboratory simulations and educational learning exercises are available for a fee. Commercial products Anatomy & Physiology LabPaqs – Hands-on laboratory experiences Also see the list of other Biology Labs. Return to the List of Subjects.
Zygote | 3D Human Anatomy for Animation, Illustration, CAD and Software Development Teach.Genetics™ Science Education - Research & Training - NIH NIH Home > Research & Training Resources for Students Featured Site: NIAMS Kids Pages Your childhood and teen years are a prime time to learn habits that will help you keep your bones, joints, muscles, and skin healthy for years to come. Resources for Educators Science Education Partnership Award (SEPA) From science museums to K-12 classrooms, NIH’s SEPA Program supports exciting and innovative educational programs that boost understanding of health and science research among students and the general public. From the NIH Director Francis Collins, M.D., Ph.D., offers a message to high school graduates.
Tree of Life Web Project The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world. On more than 10,000 World Wide Web pages, the project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history (phylogeny). Each page contains information about a particular group, e.g., salamanders, segmented worms, phlox flowers, tyrannosaurs, euglenids, Heliconius butterflies, club fungi, or the vampire squid. Remarkable animal and plant life cycles - science(2,3,4) - ABC Splash - Add this to your favourites Remarkable animal and plant life cycles Find out about animals such as mammals that give birth to live young. Find out what's special about marsupials and the strange monotremes. Discover more about animals that lay eggs and animals that undergo metamorphosis. About this digibook Animals grow and change watch Mammals of the sea watch Animals with pouches watch The amazing seahorse watch Odd egg-laying mammals watch Egg-laying animals watch Female turtles return to lay eggs watch How an egg forms inside a bird watch Insects with only three stages of life watch Four stages in a butterfly's life cycle watch Complete change: complete metamorphosis watch Inside the fruit of a plant watch Growing plants from seeds watch The mysterious mushroom watch Who is this for? Primary Science Years: 2,3,4 Copyright information Belongs to the topic: Animals Plants