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ludmilkaskok [199]
3 years ago
9

The oxygen sag curve is related to all of the following except

Biology
2 answers:
Dima020 [189]3 years ago
6 0

The answer is A. Oligotrophic lakes are clear and hence have little vegetation in them (hence no net primary production) that could initiate the process of eutrophication.  Eutrophication is brought about when bacteria break down the high amount of organic matter hence reduce the oxygen supply in the waters.

inessss [21]3 years ago
5 0

The oxygen sag curve is related to all of the following except oligotrophic lakes.

Further Explanation:

Oxygen sag curve is obtained when the amount of the dissolved oxygen inside a river in which pollutant and sewage is released is plotted against distance downstream from a sewage pipe. In this small amount of water is taken from downstream and upstream areas from sewage outlet.  The occurrence of sewage in water reduces the content of the oxygen into the water and increases the BOD. It is referred as biochemical oxygen demand. This develops due the activity of saprotrophic organism that mainly decomposes the organic substances of the sewage.

Oligotrophic lakes are clear and hence have little vegetation in them. Hence, there is no net primary production that could initiate the process of eutrophication. Eutrophication is a process which initiate when the bacteria break downs the very high amount of organic substances and reduces the oxygen supply in the water.

Learn more:

1. Learn more about cell organelle brainly.com/question/5923583

2. Learn more about the diffusion brainly.com/question/1386629

3. Learn more about the plant brainly.com/question/862697

Answer Details:

Grade: High School

Subject: Biology

Topic: Oxygen sag curve

Keywords:

Oxygen sag curve, reduce, supply, substance, eutrophication, organic substance, water, lakes, downstream, upstream, biochemical oxygen demand.

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A poisonous substance enters the food chain through the soul. This substance doesn't break down in the bodies of living organism
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Explanation:

Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.[1] This increase can occur as a result of:

Persistence – where the substance cannot be broken down by environmental processes

Food chain energetics – where the substance's concentration increases progressively as it moves up a food chain

Low or non-existent rate of internal degradation or excretion of the substance – mainly due to water-insolubility

In biomagnification the concentration of the persistent toxins (crosses) increases higher up the food chain.

In this scenario, a pond has been intoxicated. As we go further into the food chain, the toxin concentration increases, causing the top consumer to eventually die of intoxication.

Biomagnification is the build up of toxins in a food chain. The DDT concentration is in parts per million. As the trophic level increases in a food chain, the amount of toxic build up increases. The x's represent the amount of toxic build up accumulating as the trophic level increases. Toxins build up in organism's fat and tissue. Predators accumulate higher toxins than prey.

Biological magnification often refers to the process whereby certain substances such as pesticides or heavy metals work their way into lakes, rivers and the ocean, and then move up the food chain in progressively greater concentrations as they are incorporated into the diet of aquatic organisms such as zooplankton, which in turn are eaten perhaps by fish, which then may be eaten by bigger fish, large birds, animals, or humans. The substances become increasingly concentrated in tissues or internal organs as they move up the chain. Bioaccumulants are substances that increase in concentration in living organisms as they take in contaminated air, water, or food because the substances are very slowly metabolized or excreted.

Contents

Processes Edit

Although sometimes used interchangeably with "bioaccumulation", an important distinction is drawn between the two, and with bioconcentration.

Bioaccumulation occurs within a trophic level, and is the increase in the concentration of a substance in certain tissues of organisms' bodies due to absorption from food and the environment.

Bioconcentration is defined as occurring when uptake from the water is greater than excretion.[2]

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Biodilution is also a process that occurs to all trophic levels in an aquatic environment; it is the opposite of biomagnification, thus when a pollutant gets smaller in concentration as it progresses up a food web.

Lipid, (lipophilic) or fat soluble substances cannot be diluted, broken down, or excreted in urine, a water-based medium, and so accumulate in fatty tissues of an organism, if the organism lacks enzymes to degrade them. When eaten by another organism, fats are absorbed in the gut, carrying the substance, which then accumulates in the fats of the predator. Since at each level of the food chain there is a lot of energy loss, a predator must consume many prey, including all of their lipophilic substances.

For example, though mercury is only present in small amounts in seawater, it is absorbed by algae (generally as methylmercury). Methyl-mercury is the most harmful variation of mercury. It is efficiently absorbed, but only very slowly excreted by organisms.[3] Bioaccumulation and bioconcentration result in buildup in the adipose tissue of successive trophic levels: zooplankton, small nekton, larger fish, etc. Anything which eats these fish also consumes the higher level of mercury the fish have accumulated. This process explains why predatory fish such as swordfish and sharks or birds like osprey and eagles have higher concentrations of mercury in their tissue than could be accounted for by direct exposure alone. For example, herring contains mercury at approximately 0.01 parts per million (ppm) and shark contains mercury at greater than 1 ppm.[4]

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Answer:

The answer is B, How does gravitropism affect plant growth?

Explanation:

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"Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant or fungus in response to gravity pulling on it."

So, since the students put the pots on their sides, and they say that the bean plants bend upwards, then option B is the only logical explanation for the plants' behavior.

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