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What does it mean if the photosynthetic rate is negative?
A negative photosynthetic rate means that the rate of respiration in the plant is higher than the rate of photosynthesis, resulting in a net loss of carbon dioxide and oxygen production. This negative value can occur during certain conditions like low light intensity or limited carbon dioxide availability.
What organ is able to extract dissolved oxygen from water?
Fish extract dissolved oxygen from water through their gills. The gills are equipped with thin membranes that allow for the exchange of gases, whereby oxygen in water diffuses into the bloodstream and carbon dioxide is released.
How does the temperature of water affect the amount of oxygen dissolved in it?
The temperature of water affects the amount of oxygen dissolved in it. Generally, colder water can hold more oxygen compared to warmer water. This is because cold water molecules are closer together, allowing more oxygen molecules to dissolve in the water. Conversely, warmer water molecules are farther apart, making it harder for oxygen to dissolve.
What is biological imortance of air dissolved in water?
The oxygen in air dissolved in water is essential for aquatic organisms to perform respiration. It allows fish and other aquatic life to extract oxygen from the water to survive. Additionally, air in water can also contribute to the regulation of pH levels by buffering acids and bases.
What produces dissolved oxygen?
A) light reaction alone B) Clavin cycle alone C) both A & B D) neither of both E) Occur in the chloroplast but not the part of photosynthesis
As water temperature increases dissolved oxygen does what?
As water temperature increases, the solubility of oxygen decreases. This means that warmer water holds less dissolved oxygen than cooler water. This can have negative impacts on aquatic life as they rely on oxygen dissolved in water for respiration.
Does a biological oxygen demand value would be a negative value?
The only way a biochemical oxygen demand value could be negative is if oxygen increased in your incubation. This could result from several errors, but most likely light was allowed to penetrate your bottle allowing photosynthesis to occur. If everything was done correctly (e.g. insturments are calibrated and working, no errors were made in calculations) you should have at least a 1mg/L difference between initial and final dissolved oxygen readings yielding a positive value.
Normal ranges for dissolved oxygen test?
dissolved oxygen is dissolved oxygen
What is the oxygen dissolved in water is a?
The oxygen dissolved in water is a measure of dissolved oxygen (DO).
What can dissolved oxygen tell us about water quality?
Dissolved oxygen levels in water can indicate its ability to support aquatic life. Low dissolved oxygen levels can stress or harm aquatic organisms, leading to negative impacts on the overall ecosystem health. Monitoring dissolved oxygen is important for assessing water quality and ensuring the well-being of aquatic ecosystems.
When sodium chloride is dissolved into water what part of the water molecule does sodium get attracted to?
When sodium chloride is dissolved in water, the sodium ions are attracted to the partially negative oxygen atoms of water molecules. These oxygen atoms have a slight negative charge due to their higher electronegativity compared to hydrogen atoms. This attraction results in the formation of a hydration shell around the sodium ions.
How might you account for dissolved oxygen concentrations of such a low value at a temperature of 25C?
Low dissolved oxygen concentrations at 25°C could be due to factors like high water temperatures, which reduce the amount of oxygen that can remain dissolved in water. Additionally, high organic matter levels or excessive algal blooms can result in increased oxygen demand, lowering the dissolved oxygen concentration. Poor water circulation or a lack of aeration can also contribute to low oxygen levels.
When calcium chloride is dissolved in water to which end of the adjacent water will a calcium ion be attracted?
The oxygen end, which is the negative pole.
What would happen if dissolved oxygen percentage falls below 8?
When dissolved oxygen falls below 8%, aquatic organisms may experience stress or die due to oxygen deprivation. This can disrupt the ecosystem balance, leading to fish kills and other negative impacts on the aquatic habitat. Monitoring and maintaining appropriate levels of dissolved oxygen is crucial for the health of aquatic organisms.
What's dissolved oxygen?
Dissolved oxygen is the current amount of oxygen in the water. A certain amount of Dissolved Oxygen Is needed to keep the fish alive, if any of the dissolved oxygen decreases by either a little or a lot it can cause changes in the water, normally if the dissolved oxygen decreases so do the fish and aquatics life's life.
What is dissolve oxygen?
Dissolved oxygen refers to the amount of oxygen present in water. It is essential for aquatic life to breathe and thrive. Factors such as temperature, water flow, and levels of organic matter can impact the amount of dissolved oxygen in water.
What is oxygen in water called?
Oxygen dissolved in water is typically referred to as dissolved oxygen (DO). The amount of dissolved oxygen is crucial for the survival of aquatic organisms and is influenced by factors such as temperature, pressure, and biological activity.
