When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. The blue-black color of Iodine is due to the presence of starch. The leaf that was in the light turned blue-black, which shows that it has been performing photosynthesis. One type is called iodide and it is the same color as the iodine-containing leaf. This type of leaf is used to test for iodine deficiency.
It is also used as a diagnostic tool to determine if you are iodine deficient. If you have a yellow-green leaf, your iodine level is too low and you need to get more iodine in your diet. You can get iodine by eating foods that are rich in iodine, such as seaweed, kelp, and green leafy vegetables.
Table of Contents
How do you measure the rate of photosynthesis in pondweed?
The pondweed should be 10 cm away from the light source if the boiling tube is moved. For five minutes, allow the boiling tube to stand. Take the number of bubbles from the cut end of the stems and count them. You can record the results on a piece of paper when you repeat the count five times.
Remove the tube and allow the water to cool to room temperature. Remove the stem and place it in a bowl of ice water. Let it sit for a few minutes, then remove it and rinse it under cold running water until it is completely dry. The stem can be stored in the refrigerator for up to a week.
Why was an aquatic plant used to measure photosynthesis?
Plants produce oxygen which is invisible and odorless, so the experiment is usually carried out with water plants; the bubbles of oxygen in the water can be detected by a spectrophotometer. In this experiment, the plant is placed in a container with a small amount of water. The water is kept at a temperature of about 20°C (68°F).
The plants are allowed to grow for a few days, and then they are removed from the container. They are then placed on a glass plate and exposed to the air for several hours. When the plants have grown to a certain size (about 1 cm (0.4 inch) in diameter), the plate is removed and the leaves are cut off. These leaves can then be dried and used as fertilizer for other plants.
What are two ways that the rate of photosynthesis could be measured?
Explain that the rate of photosynthesis can be measured directly by the production of oxygen or the absorption of carbon dioxide, or indirectly by measuring the amount of light that is absorbed by photosynthetic organisms.
Explain how plants use sunlight to produce carbohydrates, and how they use the energy from the sun to grow and reproduce.
Which of the following can be used to measure photosynthesis?
Oxygen is the most abundant element on Earth. It is present in all of the air we breathe, and it is also found in water and in plants. Carbon dioxide, on the other hand, is a gas that is produced by the burning of fossil fuels, such as coal, oil and natural gas.
This gas is used to produce electricity and heat, as well as to create oxygen for plants and animals to breathe. Oxygen has a very short half-life, which means that it takes a long time for it to return to its original state after it has been inhaled or exhaled.
For example, if you take a breath of air that contains 100% oxygen, it will take about 10 minutes for the oxygen to be returned to your lungs. If you inhale the same air, however, you will be able to exhale it back into your body in a matter of seconds.
The same is true for CO 2, which is formed when fossil fuel combustion is combined with water.
What machine measures photosynthesis?
The ci-340 handheld photosynthesis system is a portable, single-handed tool that measures photosynthesis, respiration, transpiration, stomatal conductance, and chlorophyll concentration. It is designed to be used in a wide variety of applications, including: Photovoltaic solar cells (PV) and solar thermal systems (STS) for residential and commercial applications. Bioreactors for the production of biofuels and bioproducts (e.g., ethanol, biodiesel, biogas, bioethanol, cellulosic biofuel, etc.) and the processing of these materials into bio-based products.
What apparatus used measure the rate of photosynthesis?
Plants and animals use manometric apparatus to measure the rates of photosynthesis and respiration. They are used to measure the rate at which photosynthetic energy is converted into chemical energy in the form of carbon dioxide and water. In the case of plants, they are usually attached to the leaves or stems of the plant.
The apparatus consists of a camera, a light source, and a sensor that measures the amount of light that is reflected from the leaf or stem. In some cases, the apparatus can also be used in conjunction with a spectrometer, which is a device that analyzes the wavelengths of visible light emitted by a plant or animal.
How do you measure the rate of photosynthesis in water?
The amount of gas evolved over the course of a day can be measured by using the Audus apparatus, or by counting bubbles from pondweed. In addition to measuring the number of photosynthetic molecules produced by a plant, the apparatus can also be used to determine the rate at which the plant is producing oxygen.
This is done by measuring how long it takes for the water in the pond to evaporate from the surface of the plants, and then comparing this time to the time taken to produce the oxygen molecules. If the ratio of these two times is greater than 1.0, then oxygen is being produced at a faster rate than water is evaporating.
How can you measure productivity in an aquatic system?
Primary productivity can be measured from the amount of oxygen consumed by a volume of water in a fixed period of time; water for which productivity is to be determined is enclosed in sealed white and dark bottles and placed in an incubator at a temperature of 25 c.
In the present invention, a method for determining the productivity of a water sample is provided. In this method, an oxygen concentration of at least 0.1 mg/L is measured in the sample by means of gas chromatography-mass spectrometry (GC-MS).
The method comprises the steps of: (1) the addition of an oxidizing agent (e.g., hydrogen peroxide) to a sample; (2) an extraction with aqueous sodium hydroxide (NaOH); (3) purification by filtration; and (4) analysis by mass spectroscopy (MS) using a mass-spectrometer equipped with an ion-selective detector (i.e., a detector that detects the presence or absence of one or more ions of interest).