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.
Xylem tissue is non-living tissue. * Phloem carries glucose to tissues where it is stored or used in respiration * * * * * * * * * * Movement of Substances in Xylem and Phloem * Current theory explaining upward water movement in xylem involves passive process of cohesion, transpiration pull, tension and adhesion * The source-to-sink model explains active transport or translocation of sugar in phloem * Regulating Water and waste products * Water regulation is essential because: * The water in cells containing substances needed for chemical reactions. Too much or too little water changes the concentration of these substances * Too much or too little water will change the rate at which substances move in and out of cells * Metabolic processes produce waste. These wastes are toxic to cells and must be removed * Wastes include carbon dioxide (Produced during cellular respiration) and ammonia) produced from the breakdown of excess protein). Ammonia is very toxic and need to be removed quickly.
Water is also used to carry vitamins and minerals to our body’s cells. This is done through our blood. Our blood is ninety-two percent water. Water is also used to remover waste from out body cell produce waste must be removed from the body. This is done when we use the bathroom.
Answer = The dissolved oxygen (DO) is oxygen that is dissolved in water. The oxygen dissolve by diffusion by diffusion from the surrounding air aeration of water that has tumbled over falls and rapids and as waste product of photosynthesis, fish and aquatic animals cannot split oxygen from water (H2O) or other containing compounds. Only green plants and some bacteria can do that through photosynthesis and similar processes. (www.lenntech.com/why_the_oxygen_dissolved_is_important 3. Construct a hypothesis – Based on your observation in question 1 and your background research in question 2, develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of
These dead cells are firmly attached to one another and are keratinised and they protect the living cells beneath them and help prevent water loss. b) How does the skin assist in body temperature control? • Sweat glands produce a liquid that is released through the pores in the epidermis. When this liquid is released on the surface of the body it evaporates and this in turn
The shape of a cell is related to its function because of the adaptations made throughout time to make the cell as efficient as it can be. There are two types of cells, eukaryotic cells, which are generally plant and animal cells and prokaryotic cells which relate to bacteria and fungi, which undergo asexual production. Plants are anchored into the ground by roots. The function of roots is the transportation of water and mineral ions from the soil into the xylem to transport around the plant. The roots have an outer layer of cells called root hair cells that have a specific shape that makes the uptake of water and mineral ions more efficient.
It binds with starch so the more starch, the darker the solution was. We also used a blank solution with no starch to set the spectrometer to zero. The spectrometer was used to compare the absorbency of the starch in the control solutions and the non-control solutions over time. Amylase was the last solution added to start the initial breakdown of the starch. Adding it at one minute intervals allowed the students to see how much starch the amylase was actually breaking down over time.
At the high pHs, the enzyme lactase is denatured and is no longer able to break down the sugar lactose in milk. Therefore, no glucose is present and the test strips remain blue. . The optimum range for the activity of lactase would be considered pH 2-7. The water control tube should match the tube with a
Anh Le 10SC Bio Where are the stomata? Aim: To determine where the water comes out of the leaf or not which would explain where the stomata are located. If yes, water does come out then where? Variables: Independent: Side where the Vaseline is applied to: Where you place the vaseline if you apply it or not will determine if the water vapor will escape or not will enable you to measure the weight change. Dependent: Weight of the leaves: First of all you find the original weight of the leaves.
The phosphate activity found in our extract would be acidic because the pH is low. 4. (4pts) Write an abstract for this experiment. An abstract is a short paragraph (three to five sentences) that communicates the purpose of the experiment and states the specific conclusions determined by the experiment. Do not go into detail about the protocol.