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DochEvi [55]
3 years ago
8

Mercury is a toxin that is of significant concern due to biomagnification. Explain how mercury found in an aquatic environment c

an accumulate in
biomagnification, and explain how limiting consumption of large predatory fish, such as swordfish, may be necessary for individuals trying to avoid high
mercury concentrations
Biology
1 answer:
PIT_PIT [208]3 years ago
3 0

Answer: Mercury has been well known as an environmental pollutant for several decades. As early as the 1950's it was established that emissions of mercury to the environment could have serious effects on human health. These early studies demonstrated that fish and other wildlife from various ecosystems commonly attain mercury levels of toxicological concern when directly affected by mercury-containing emissions from human-related activities. Human health concerns arise when fish and wildlife from these ecosystems are consumed by humans.

During the past decade, a new trend has emerged with regard to mercury pollution. Investigations initiated in the late 1980's in the northern-tier states of the U.S., Canada, and Nordic countries found that fish, mainly from nutrient-poor lakes and often in very remote areas, commonly have high levels of mercury. More recent fish sampling surveys in other regions of the U.S. have shown widespread mercury contamination in streams, wet-lands, reservoirs, and lakes. To date, 33 states have issued fish consumption advisories because of mercury contamination.

These continental to global scale occurrences of mercury contamination cannot be linked to individual emissions of mercury, but instead are due to widespread air pollution. When scientists measure mercury levels in air and surface water, however, the observed levels are extraordinarily low.

Explanation:

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I hope this answers to your question

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A single celled salt water protozoan is transferred to a a freshwater lake. What might happen to the protozoan
hichkok12 [17]
<h2>Answer</h2>

A single celled salt water protozoan is transferred to a a freshwater lake. What might happen to the protozoan

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<h3>#CarryOnLearning</h3>

\sf\green{— \ WatanabeHaruto⚘}

4 0
2 years ago
Which of the following is an important exception to the central dogma of molecular biology? a) Proteins are responsible for most
iogann1982 [59]

Answer:

b: many genes code for RNAs that function directly in the cell

Explanation:

<em>The central dogma</em> theory describes the basic framework for gene expression in living organisms. Genetic information from DNA is encoded or transcribed as RNA which then becomes translated as proteins.

The processes that take place for gene to be successfully expressed are;

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<em>Replication</em> is a process whereby DNA makes a copy of itself to be distributed in daughter cells during cell division.

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<em>The correct option is b.</em>

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