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Orlov [11]
3 years ago
13

Mercury is a heavy metal that occurs naturally in minerals and rocks. Release of mercury from natural sources has been relativel

y constant over time. However, anthropogenic release of mercury has increased significantly in recent years primarily due to increased fossil fuel mining and combustion. Mercury that is released into the air eventually ends up in soils or surface water. Once in water, microbes convert mercury into methyl mercury, which is absorbed quickly and concentrated in the tissues of predatory fish such as shark and swordfish. Large fish typically concentrate more mercury than small fish. People who eat fish with high methyl mercury concentrations can show tremors, deafness, muscle dysfunction, and attention deficits. Pregnant women and children are especially sensitive to methyl mercury's toxic effects. Learning disabilities and developmental delays are common in children who have been exposed to significant levels of methyl mercury. Based upon the specific health effects described above, mercury would be best classified as a ________.
Biology
1 answer:
jeka57 [31]3 years ago
6 0

Answer: Neurotoxin

Explanation:

The neurotoxin is a substance which alters the function as well as the structure of the nervous system. Mercury is a type of neurotoxin. This is caused by the exposure to the mercury. The long term exposure to mercury affects the functioning of the brain. This affects the motor and muscular coordination as an effect of mercury poisoning.

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Answer please! I'll give brainlist
krok68 [10]

Answer:

C

Explanation:

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4 0
3 years ago
At some point in their life cycle, all chordates have a postanal tail, ______, hollow nerve cord, and ______.
vfiekz [6]

At some point in their life cycle, all chordates have a postanal tail, __Notochord ____, hollow nerve cord, and ___Pharyngeal slits___.

<h3>Chordates </h3>

Chordates are animals belonging to the phylum chordata they include vertebrates, lancelets and tunicates of which vertebrates are the most common. As they develop throughout their life time they posses certain characteristics at some point and they are;

  • Postanal tail
  • Notochord
  • hollow nerve cord
  • Pharyngeal slits

Hence we can conclude that At some point in their life cycle, all chordates have a postanal tail, __Notochord ____, hollow nerve cord, and ___Pharyngeal slits___.

Learn more about Chordates : brainly.com/question/1674644

8 0
2 years ago
What’s needed for dna to be copied
abruzzese [7]

Answer:

The need for DNA replication

DNA replication is the process by which a cell makes an identical copy of its DNA. This process is performed at the beginning of every cell division so that when the cell divides, each daughter cell will inherit an identical copy of the DNA.

Requirements for DNA replication

Original DNA template - DNA is a double helix made of two complementary strands. Each strand can be used as a template to create a new DNA molecule.

Free DNA nucleotides – needed to form the new strands.

DNA polymerase – an enzyme that adds new nucleotides to a growing strand of DNA.

Primers – A primer is a short strand of nucleotides that will bind to the 3’ end of the template DNA strand allowing DNA polymerase to add free DNA nucleotides.

Explanation:

https://www.bbc.co.uk/bitesize/guides/zrwhrj6/revision/1

4 0
3 years ago
Read 2 more answers
Organism at the end of a food chain
stira [4]

Answer:

is always a higher organism

Explanation:

lets take an example:

food chain consisting of zooplankton, small fish, big fish and man

as the order goes in the question ,the organism at the end of this food chain is man

5 0
3 years ago
What is the name for fingerlike projections that protrude from the absorptive mucosal cells of the small intestine into the lume
allsm [11]

Answer:

Villi

Explanation:

In the small intestine, villi are found present. These villi which appear like a finger-like tissue structure are about 0.5–1.6mm in length in human beings.They have mucosal cells that help in absorption of nutrients. A villus has several microvilli, which increases the surface area of the intestinal wall for faster absorption of nutrients.

6 0
3 years ago
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