Cell Size and Scale Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Four Stages of Cellular Respiration Cellular respiration is the sum of the various biochemical means that eukaryotic organisms employ to extract energy from food, specifically glucose molecules. The cellular respiration process includes four basic stages or steps: Glycolysis, which occurs in all organisms, prokaryotic and eukaryotic; the bridge reaction, which stets the stage for aerobic respiration; and the Krebs cycle and the electron transport chain, oxygen-dependent pathways that occur in sequence in the mitochondria. The steps of cellular respiration do not happen at the same speed, and the same set of reactions may proceed at different rates in the same organism at different times. For example, the rate of glycolysis in muscle cells would be expected to greatly increase during intense anaerobic exercise, which incurs an "oxygen debt," but the steps of aerobic respiration do not speed up appreciably unless exercise is performed at an aerobic, "pay-as-you-go" intensity level.
Learn Biology Online For Free with our Huge Collection of Open Courses If you’ve always been interested to learn more about nature and the diversity of life, you can now Learn Biology Online for Free! Free Biology courses are easy to find yet some of the ones you find may not be worth your time. We’ve put together a list of Biology courses from well-respected institutions such as John Hopkins, Yale, MIT, Stanford, and UCLA. Plant and Animal Cell Worksheets This collection of animal and plant cell worksheets strikes a balance between cognitive and psychomotor domains of learning and offers a conceptual grounding in cell biology. The worksheets recommended for students of grade 4 through grade 8 feature labeled animal and plant cell structure charts and cross-section charts, cell vocabulary with descriptions and functions and exercises like identify and label the parts of the animal and plant cells, color the cell organelles, match the part to its description, fill in the blanks, crosswords and more. Diffuse into a cell with our free worksheets! Plant Cell Diagram | Animal Cell Diagram Featured in this printable worksheet are the diagrams of the plant and animal cells with parts labeled vividly.
Diversity "Diversity is not about how we differ. Diversity is about embracing one another's uniqueness." - Ola Joseph "United we stand, divided we fall." - Aesop (620 -560 B.C.) 10 Tips for Teaching Cells - Getting Nerdy Science Graphic Organizers and Analogies: As students learn the names of all the crazy organelles found inside of bacteria, plant, and animal cells, the key to helping them remember the parts and functions is to use a cell organelle graphic organizer. We like to give student a template for detailing what kind of cell has these organelles, their locations, brief description of their appearance, and their function. In order to further help students retain the information we create a picture or drawing that incorporates all of the info they wrote about that organelle.
It's Plantin' Time! One of the most anticipated science units in my classroom is our study of life cycles. We spend most of our fourth quarter studying the life cycles of plants, butterflies, frogs, and mealworms. It's one of my most favorite times of the year and one that my kiddos really look forward to! Our end of the year open house falls during this time and we made these flower booklets from myLife Cycle of Plants unit to showcase our plant study.
iCell App Launch Tool iPadiPhoneiPod TouchAndroidWeb-based iCell gives you an interactive, 3D view inside a cell. You can study cell structures using a dynamic and realistic virtual model. Eukaryote Eukaryotes can reproduce both asexually through mitosis and sexually through meiosis and gamete fusion. In mitosis, one cell divides to produce two genetically identical cells. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells each with half the number of chromosomes as the original parent cell (haploid cells). These act as sex cells (gametes – each gamete has just one complement of chromosomes, each a unique mix of the corresponding pair of parental chromosomes) resulting from genetic recombination during meiosis. Cell features