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.
Describe and explain the roles of water in living organisms and as an environment for living organisms Water has many different properties than enable it to be easier for organisms to live in. Firstly, water is a great solvent. The importance of this is that the metabolic processes in all organisms rely on chemicals being able to react together in solution. We can see this through many examples for organisms. To start with, there is the transport of nutrients, in glucose and amino acids in the blood.
Plant Pigments Depending on Photosynthesis. Is the rate of photosynthesis faster when there are extreme light and temperatures present? Paper chromatography is a technique used for separating and identifying pigments. The solvent DPIP, (2, 6-dichlorophenol-indophenol), which is often used to substitute for NADPH, moves up the paper by capillary action. As the solvent moves up the paper, it carries along any substances dissolved in it, which are the pigments.
Photosynthesis is the process where light energy is converted into chemical energy in the form of glucose. Its overall equation is: 6CO2 + 6H20 + light energy C6H12O6 + 6O2. The process of photosynthesis can be split into two reactions: the light-dependent reaction in the thylakoids and the light-independent reaction in the stroma. During the light-dependent reaction, light energy from the Sun is absorbed by chlorophyll (found in the chloroplasts in the leaf). This causes the excitation of two electrons, and they move to a higher energy level.
As sucrose moves out of the phloem sap and into surrounding cells (with energy), water flows out of them. This reduces the pressure in the sieve cells at the sink region (less sugar) and the water moves back to the phloem Perform a firsthand investigation to demonstrate the effect of dissolved carbon dioxide on the pH of water 1. Blowing through a straw into the water 1. High technology read the levels of water pH as the carbon dioxide from our breath was dissolved into the water Perform a firsthand investigation using the light microscope and prepared slides to gather information to estimate the size of the red and white blood cells and draw scaled diagrams of each 2. Red blood cell = 7-9 um (micro metres) 3.
Maintain Body Temperature * The production of perspiration by sudoriferous (sweat) glands helps to lower body temperature back to normal. * Changes in the flow of blood to the skin also alter its insulating properties and help to adjust body temperature. 2. Protection * The skin covers the body and provides a physical barrier that protects tissues from physical abrasion, bacterial invasion, dehydration, and UV radiation. * Hair and nails also have protective function.
These plants open their stomata during the night and close them during the day. Closing stomata during the day helps the plant conserve water, but it also prevents carbon dioxide from entering the leaves. During the night, their stomata is open and they take up carbon dioxide, incorporating it into a variety of organic acids. The mesophyll cells of CAM plants store the organic acids they make during the night in their vacuoles until morning, when the stomata close. During the day, carbon dioxide is released from the organic acids made the night before to become incorporated into sugar in the chloroplasts.
The combination of high resin content and low density means easy ignition and a lesser burn time. When looking for fast burning wood, it is recommended to find wood that has been dried. If wood is wet, energy from the fire is wasted because it must first evaporate the trapped water then it has to burn. For the most part, if the wood is wet there is more smoke, less flame, and more burning time. Wood that is freshly cut (also referred to as green wood) and is considered young compared to older “seasoned” wood.
Water beneath the surface becomes insulated and less likely to freeze. | Lakes tend not to freeze completely so aquatic organisms aren’t killed as temperatures fall. | Thermal Stability | Large bodies of water have fairly constant temperatures.Evaporation of water can cool surfaces by removing heat. | Oceans provide a relatively stable environment in terms of temperature.Many land-based organisms use evaporation as a cooling mechanism, for example in panting or sweating. | Metabolic | Water takes part as a reactant in some chemical processes.
It is also a weed suppresser to prevent other weeds from growing because it grows so fast and densely, it blocks out sunlight to other weeds that are trying to grow. This allows farmers to use hemp as a replacement for herbicides and reducing toxins into the ground and surrounding water sources. Hemp can be used to replace petroleum and plastic products and are still biodegradable so it reduces the amount dumped into landfills. Since hemp can be used to replace gasoline and petroleum essentially replacing oil this reduces the environmental risks and impacts of oil drilling. This is a major environmental impact made when off shore drilling accidents happen made seen to the public by the BP accident in April of 2010 where 200 million gallons of crude oil was “spewed” into the ocean.