Do all toxic substances in the environment bioaccumulate

Biology

1 answer:

Degger [83]3 years ago

6 0

Answer:

it cannot be easily degraded in our environment.Like humans, animals and plants are exposed to PBTs in the environment through air, water and food. ... Persistent bioaccumulative toxic substances (PBTs) are chemicals that do not degrade easily in the environment.

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A farmer notices that the corn in her fields is growing slowly. So she adds twice the normal amount of fertilizer to each field.

Vikentia [17]

<h2>The correct answer is: Eutrophication.</h2>

Explanation:

Fertilizers are inorganic o organic nutrients highly rich in elements like nitrogen, potassium and phosphorus which are essential for the growth of plants.
The application of excess fertilizers in the soil causes the surface run off as well as leaching of these nutrients into the soil from where it is gradually transferred into the nearby water bodies, in this case the lake adjacent to the farmer's property.
In the lake, these nutrients promotes the growth of plants like algae.
The excessive growth of algae in the lake disturbs he ecological balance of the lake and causes a dearth of oxygen in it. This phenomenon is said to be called Eutrophication.
The reduction in the level of oxygen in the lake causes the animals, like fishes, in it to gradually die.

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3 years ago

OSMOSIS is a type of ______________ diffusion.

Anna35 [415]

I think the answer is Passive

7 0

3 years ago

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During science class, Mr. Webber read four scenarios to his class, which all describe an object in

wel

Answer:

I believe it would be C.

Explanation:

The change in the direction is the key factor to look at to find the answer

7 0

2 years ago

the activities in the cell cycle occur during a specific phases. In which phase of the cell cycle is DNA replicated?

ValentinkaMS [17]

Answer:

S phase

Explanation:

The S is short for synthesis, which means that DNA is being replicated. This is one of the stages of interphase, when the cell is growing and getting ready to divide. Well, this is the getting ready to divide part of interphase; the cell needs to duplicate its DNA so it has enough to divide out to daughter cells.

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2 years ago

The blood sugar in your body is maintained by a gland that acts as an exocrine and endocrine gland. It is the

Irina-Kira [14]

Answer:

Pancreas.

Explanation:

Pancreas is an organ that acts as both exocrine as well as endocrine gland. As exocrine gland, it secretes digestive enzymes into the small intestine that help in digestion of complex food molecules.

As an endocrine gland, it secretes glucagon (from alpha cells) and insulin (from beta cells) hormones, directly into the bloodstream. Both of these hormones are responsible for the regulation of blood sugar level in the body.

Thus, the correct answer is 'pancreas.'

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2 years ago