Chapter 1/2 Bio Study Guide Section 1.1-Scientific Method Science- An organized way of gathering and analyzing evidence about the natural world Scientific Method 1. Collecting observations 2. Asking questions 3. Forming a hypothesis 4. Experiment 5. Analyze results and draw conclusions 6. Revise hypothesis Control Group- a group in the experiment that receives no experimental treatment Independent Variable- Variable that you change in the experiment X-axis Dependent
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is the Effect of the Colour of Light on the Rate of Photosynthesis? By Amelia Rowan‚ 12SDa Aim To discover whether the colour of the light source has any effect on the rate of photosynthesis of a sample of algae. Hypothesis It was predicted that the colour of the light source would have a very slight effect on the rate of photosynthesis. It was further predicted that when the sample was placed under the green light‚ the rate of photosynthesis would be the lowest. This hypothesis was arrived
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Abstract This experiment focused on extracting and separating pigments of Chloroplast. For the procedure green leaves were grinded in a mortar with some chemicals and the fluid was filtrated to use for further analysis. Stripes of this solution were put on a filter paper and later‚ after dried placed into a beacon of solvent. After this the chloroplast pigments were separated by the solvent into groups of more or less soluble pigments. Aim How many pigment types are present in a green leaf? It
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Definition/comparison questions Evolution / Selection Evolution is a slow continuous process of change that happens in plants and animals over a long period of time resulting in a change from simpler to more complex forms. This is the reason modern day plants and animals are different from those of past. The competition for resources will favour organisms with better adaptability and certain variations over others hence leading to change in the rate of occurrence of certain traits within that population
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permeable to water‚ gases and dissolved substances. (ii) A large central vacuole- it is a space filled with cell sap. The vacuole is often called sap vacuole and is surrounded by a membrane. It helps to maintain the shape of the cell. (iii) Chloroplasts- these are small structures lying in the cytoplasm. They contain the green
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ENDOCYTOSIS (PHAGOCYTOSIS & PINOCYTOSIS & EXOCYTOSIS Photosynthesis Chemical Reaction for photosynthesis: Water + Carbon dioxide à Glucose + Oxygen 6H2O + 6CO2 C6H12O6 + 6O2 Process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches Chloroplast- site of photosynthesis Cellular Respiration- process that releases energy
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renewable energy source. Scientists with the U.S. Department of Energy have created this new source of energy from a project known as “Artificial Leaf”. The project‚ “Artificial Leaf”‚ is similar to normal green plants in that it carries out a form of photosynthesis through a chemical reaction involving sunlight and the molecules found in water‚ hydrogen and oxygen. Peidong Yang‚ a chemist working on the initial project‚ describes the Leaf as an “artificial photosynthetic system composed of two semiconductor
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Autumn Leaves Trees have green leaves due to the abundance of chlorophyll and chloroplasts in leaves. These organelles absorb‚ store and convert light energy from the sun and is necessary photosynthesis to occur. These organelles reflect green light which attributes to the green color of leaves. The leaves change color in the fall and winter do to the shortened times of daylight and lower temperatures. Trees also divert nutrients from leaves to store in twigs and branches for preparation of winter
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water and nutrients. * Each part of the plant has a specific function: * * leaves - carry out photosynthesis. * roots - anchor the plant & absorb water and soil nutrients. * stems - support the leaves and transport materials to other plant parts. * What does the plant use the glucose for? The plant uses sugars produced during photosynthesis to builts its structure. * Petiole - the stalk that attaches the leaf to the stem. * Covering the upper
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Plant Cells and Solar Cells Photosynthesis is the process of producing and releasing oxygen in the air. It needs sunlight‚ carbon dioxide and water. During the process of photosynthesis‚ the plants decompose the molecules of hydrogen and carbon-dioxide into hydrogen; carbon and oxygen produce glucose which forms the source of their energy‚ growth and food. Few years ago we knew that the only source of energy is photosynthesis which is used by plants to harness solar energy. Nowadays
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