The Effects of Temperature on the Swimming Behavior of Daphnia Introduction: Plankton play a large role in the ecosystem. Plankton are aquatic organisms that exist in innumerable different regions of aquatic environments. They can be utilized as a food source for other planktons, large aquatic animals, and other animals. Since they are at the pedestal of the food chain, they are important since they fill the base of the ecosystems they exist in. Many zooplanktons are also ectothermic which means temperature can highly affect metabolism and growth (Jalal et al., 2013).
Plants are the producers for an ecosystem. They photosynthesise carbon dioxide and water and produce energy in the form of carbohydrates and other molecules. Photosynthesis requires water, and plants gain water from the soil using mineral ions such as nitrate produced by the nitrifying bacteria. Hydrolysis of ATP releases energy for processes such as active transport of the nitrate ions (and others such as potassium etc) from the soil into root hair cells, a process that lowers water potential and is used to draw water into the plant from the soil. In leaves, photosynthesis involves the photolysis of water, a process that involves the attachment of two electrons to a magnesium ion in chlorophyll and the production of hydrogen ions from the breakdown of water.
The Rideau River Ecosystem and Food Web Team A BIO/101 Brian Fox The Rideau River Ecosystems are biological populations of interacting organisms and their physical surroundings. Many are areas of lands that have changed due to the nearby water currents. These areas of land are home to many animals and plants that have adapted to survive. Each individual ecosystem is comprised of different features that make it conducive to certain plants and animals. That means each ecosystem is unique.
Kelp is harvested and processed to be used as food supplements for both humans and animals. It is a thickening agent used in many products such as ice cream, pudding, salad dressing, beer, frozen food, paper paint, pharmaceuticals, and adhesives. How did the exhibit relate to the Channel Islands? / Island process? Giant kelp grows along the coastlines of the Channel Islands.
According to Hopkins (2006), photosynthesis is the process by which green plants and certain organisms transform itself from light energy into chemical energy. As a straight forward chemical reaction in which carbon dioxide comes from the air, along with the midair and water from the soil, photosynthesis conglomerates to produce what is known as carbohydrate (p. 6). Solar Energy produced by photosynthesis, stores itself in a chemical bond of a carbohydrate molecule. Sugar known as glucose is then formed which becomes convenient both by way of energy to be stored for later use in tissues or by way of carbon to be used for cells (p.7). Hopkins, w. G. (2006).
Gabriella Armstrong An Experiment Investigating the Rate of Photosynthesis in a Water Plant Introduction Photosynthesis is the process in which carbon dioxide and water are converted into glucose and oxygen. The reaction requires light energy, which is absorbed by chlorophyll. This process can be represented using an equation: Carbon dioxide + Water (+ light energy) → Glucose + Oxygen Research Question The objective of the experiment was to find out if light intensity affects the rate of photosynthesis in aquatic plants that are naturally found in water. This would be observed by the amount of oxygen bubbles released in water during photosynthesis. By shining a light at different distances to the Elodea plant a trend may be observed between light and the rate of photosynthesis.
Describe how you carried out your investigation? 1) Add 10cm³ of hydrogen carbonate indicator to each of the 5 boiling tubes 2) Select 5 pond weed shoots of the same length 3) Put pond weed shots in the boiling tube and cover with bong 4) Set boiling tubes up at 20,40,60,80 cm away from your light source 5) Look at the colour of the indicator at 30 minutes 6) convert the colour to PH using a PH spectrum 7) As Co2 is more acidic the more Co2 is used the higher the PH will rise In other words the more photosynthesis the higher the PH. What did you change in your experiment? The light intensity by changing the distance from the lamp What did you keep the same? Why?
The energy needed for photosynthesis comes from sunlight, which is the variable for this experiment. The substance that absorbs sunlight is chlorophyll, which is mainly contained in chloroplasts. This energy is used to convert carbon dioxide (CO2) and water into sugars. This conversion creates the
These amazing organisms are capable of capturing the energy of sunlight and fixing it in the form of potential chemical energy in organic compounds.” (Measuring the rate of photosynthesis) “Light is one of the main factors that affects the rate of photosynthesis, which literally means using light to create something new.” (What Are Three Factors That Affect the Rate Which Photosynthesis Occurs?) This experiment was to compare how the Elodea photosynthesized when absorbing different colors of light, and to measure the absorbance from 500 nm of wavelength to 750 nm. Based on three types of pigments that are present in plants: chlorophyll, carotenoids, and phycobilins, it was predicted that both of the rates of photosynthesis and the absorbance of different wavelengths were high under the colors of violet-blue or orange-red, while rates were low under the light color of green-yellow. Materials and Procedures: The materials used for this experiment were as follows: Elodea leaves (that have been kept in the dark), spinach leaves, blender, cheesecloth, spectrophotometer, cuvettes, beakers, large test tube, 5% sodium bicarbonate, Kimwipes, razor blade, tape, 100 mL graduated cylinder, graduated pipettes with rubber tubings, light source, ring stands and clamps, cellpphane paper. In activity 2a, green test tube was clamped to a ring stand, and filled three quarters to the top with 5% sodium bicarbonate.
Introduction: Photosynthesis is one of the most important processes for organisms to live, and it is a process that essentially absorbs light energy from the sun and turns it into chemical energy. Sunlight 6 CO2 + 6 H2O C6H12O6 + 6 O2 Carbon Water Glucose oxygen Dioxide Question: How does light intensity play a role in affecting the rate of photosynthesis in Elodea plants? Aim: The aim of my experiment is to see how much of a role light takes in the process of photosynthesis. In the sense of what sort of spectrum there is in terms of the ability of the Elodea plant to continue to photosynthesize with “too little” or “too much” light. I will do this by counting the number of bubbles that are released, as they are a product of the process of photosynthesis.