PPT-cell biology revision Keywords: organelle, diffusion , osmosis, mitosis, stem cells, eukaryotes,

Do Now What are the jobs functions of Eukaryotes vs prokaryotes Prokaryotes are single celled organisms that have no organellesparts that are surrounded by a membrane They are very small in size and need electron microscopes to be seen Example Bacteria . Intermediate 2 Biology. Unit 1: Living Cells. Diffusion. Learning Objectives. Name the method by which substances move in and out of cells.. Define the term . ‘. diffusion. ’. State when diffusion will stop.. CHAPTER 2/ O’LEVEL BIOLOGY 5090 / GCE.. 2. Diffusion and osmosis. Content. 2.1 Diffusion. 2.2 Osmosis. 2.3 Active . transport. Learning outcomes. Candidates should be able to:. (a) define diffusion as the movement of molecules from a region of their higher concentration to a region of. Overview. Cells, Tissues and Organs. Groups of specialised cells working together are called . tissues. and groups of tissues working together are called . organs. .. Mitosis. Mitosis is the process where cells divide to produce two new identical sets of chromosomes to the parent cell.. . Really smelly demonstration…... Put a few drops of vanilla in a balloon. Shake the balloon, then wait about 30 seconds. Smell the outside of the balloon. What’s going on?. EVIDENCE. INFERENCE. Revision. KEY WORDS:. Gland cells. Nucleus. Algal cell. Cellulose. Chloroplast. ASSESSMENT:. Animal & Plant Cells. B2 REVISION – CHAPTER 1 – . Cells F. Structure. Purpose. Plant/Animal/ Bacteria/all. Chapter 7. 7.1 Cell discovery and theory. The invention of the microscope led to the discovery of cells. .. microscope . Compound Light Microscope. Series of glass lenses. Uses visible light to produce a magnified image. A Chromosome and Sister Chromatids. Key Points About Chromosome Structure. A . chromosome consists of DNA that is wrapped around proteins (. histones. ) and condensed. Each . histone. and the DNA wrapped around it make up a . Molecules are always moving. Molecules move randomly and bump into each other and other barriers. Concentration gradient. Concentration Gradient - change in the concentration of a substance from one area to another.. . SIMPLE DIFFUSION. WHAT IS DIFFUSION. Diffusion is the movement of molecules or particles from a region of high concentration to a region of low concentration. . . 1. Things that have ALL the characteristics of life are called what?. ORGANISMS. All living things are… organized, grow & develop, reproduce, respond, maintain certain internal conditions & use energy.. . During the cell cycle, a cell grows, prepares for division, and divides to form two identical daughter cells, each. of which then begins the cycle again.. The series of events that cells go through as they grow and divide.. Eukaryotes: organisms with a true nucleus and membrane bound organelles; usually multicellular. Animals, plants, fungi, protists (microorganisms). Eukaryotic cells replicate for growth and development . 2. Diffusion and osmosis. Content. 2.1 Diffusion. 2.2 Osmosis. 2.3 Active . transport. Learning outcomes. Candidates should be able to:. (a) define diffusion as the movement of molecules from a region of their higher concentration to a region of. Metaphase. Anaphase. Telephase. Do now activity:. What would we find in the nucleus of a cell?. Why do cells need to divide. ?. What could go wrong when cells don’t’ divide properly?. GOOD PROGRESS:.