Grade 10 Biology Revision Guide Characteristics of Living Organisms Nutrition: Respiration: Excretion: Sensitivity: Movement: Homeostasis: Reproduction: Growth: Taking in food for growth and releasing energy. Burning glucose to release energy. Removing waste material like urea formed during chemical reactions. Responding to changes in the environment. Transport inside cells and moving the body. Control their internal conditions. Increasing the number of organisms. Increasing the number of cells
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Q1:Why is reproduction essential for organisms? Reproduction is a fundamental feature of all living organisms. It is a biological process through which living organisms produce offspring’s similar to them. Reproduction ensures the continuance of various species on the Earth. In the absence of reproduction‚ the species will not be able to exist for a long time and may soon get extinct. Q2:Which is a better mode of reproduction sexual or asexual? Why? Sexual reproduction is a better mode of reproduction
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DATE: 8th October‚ 2012 SYLLABUS TOPIC: Food Tests – Semi Quantitative Test AIM: To determine the concentration of glucose present in an unknown sample‚ using a semi quantitative glucose test APPARATUS AND MATERIALS: 4% stock solution of glucose‚ water‚ 6 test tubes‚ ruler‚ water bath‚ solution of unknown concentration (Sample A)‚ Benedict’s reagent METHOD: 1. Solutions of different concentration were made from the stock solution
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For this experiment petri-dish A is fully exposed to the light source while petri-dish B is partially exposed to the light. Independent Variable: We have chosen our independent variable to be the amount of light exposed to the cress seeds. Our first petri-dish was allowed to be fully exposed to the light surrounding it‚ while the second was fully wrapped in black paper excluding a 0.5cm slit directed towards the sun. Dependent Variable: Our dependent variable is the reaction/actions to
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1. The classification system developed by Linnaeus in the early 1700s divided living organisms into plant and animal kingdoms. Today‚ that has been expanded into five kingdoms. Which of the following inventions was most responsible for creating the need for the additional three kingdoms and why? (2 points) (0 pts) Fossil fuel-based transportation made it easier to explore and discover new species. (0 pts) Genetic engineering created new species which then needed new kingdoms. (2 pts) Microscopes
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Biomolecules Essay Before this year‚ I could never remember what DNA stood for‚ but now‚ not only do I know that it stands for Deoxyribonucleic Acid‚ I also know that there is another kind of nucleic acid called Ribonucleic Acid. RNA is an imitation for DNA‚ and like all imitations it is not a perfect replica so therefore it has small differences‚ and these small differences house the properties and opportunities for mutations and therefore it causes evolution‚ which allows us to adapt to our
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PAGE 1 Skill A: Using and Organizing Techniques‚ Apparatus and Material Title: Comparison of Soil Porosity Date: March 18‚ 2013 Aim: To prove that Sandy Soil would have the mot water after 24 hours. Apparatus/Materials: Three Conical Flasks‚ Three Filter Funnels‚ Cotton Balls‚ Measuring Cylinder‚ Loam Soil‚ 225ml of Water‚ Paper‚ Pencil Methods/Procedures: Obtain and clean out three conical flasks. Label each flask Sand‚ Loam and Clay. Plug three funnels
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Different methods of transpiration… Water uptake from the soil: Plant roots are surrounded by soil particles. The outmost layer of cells (the epidermis) contains root hair cells that increase the surface area of the root These cells absorb minerals from the soil by active transport using ATP for energy The minerals reduced the water potential of the cell cytoplasm; this makes the water potential in the cell lower than that in the soil. Movement across a root: The movement of water across the
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Lab Report: Scientific Method Your Name: Alyssa Melincoff Purpose of this Lab What is the goal of this lab? What question is it trying to answer‚ or what problem is it trying to explain? To find out how table salt affects the boiling temperature of water. Hypothesis After reading the lab instructions - but before starting the lab - record your best “educated guess” about what will happen in the experiment. What hypothesis can you generate about the effect of adding salt to water? Adding
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Some of you have been asking for clarification regarding your optional use of the MSAF‚ the student self-reporting absence form. As you may know‚ this is allowance that you are permitted to use once per term to address temporary illnesses and deadline pressures. The allowance provided is generally five days‚ but faculty are asked to specify how the MSAF is to be applied in their particular course. Here are my guidelines: For all other more serious illnesses and absences‚ you would follow the
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