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Mamont248 [21]
2 years ago
14

While waiting at an airport, Neil Campbell once overheard this claim: "It’s paranoid and ignorant to worry about industry or agr

iculture contaminating the environment with their chemical wastes. After all, this stuff is just made of the same atoms that were already present in our environment." Drawing on your knowledge of electron distribution, bonding, and emergent properties (see Concept 1.1), write a short essay (100–150 words) countering this argument
Biology
1 answer:
Deffense [45]2 years ago
6 0

That is right.

These substances are part and parcel of earth but the problem is that we are releasing them into the environment in new combinations that do not naturally exist .

Take the plastic bag for instance. It will eventually return to its original components but it takes a hundred years. In those hundred years it can kill thousands of animals which consume it, it promotes spreading of malaria when it accumulates rain water where mosquito eggs hatch and it looks revolting when dumped.

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Describe the key features of the Watson-Crick model for DNA structure.
vagabundo [1.1K]

Answer:

Watson and Crick proposed the double helical model of DNA.

Explanation:

- This model says that DNA exist as double helix. It has two polynucelotide strands running in opposite direction i.e the strands are anti-parallel.

- Each polynucleotide strand is made up of several nucleotide liknked together by phophodiester bonds.

- The two strands are not coiled upon each other but the double strand is coiled upon itself around a common axis like the spiral stair case. Here base pairs forms the stairs and backbone of two strands form railing. Back bone contains sugar and phosphate.

- The base pairing is specific, adenine always pairs with thymine and guanine always pairs with cytosine. Thus if we see any base pair, it consists of one purine and one pyrimidine.

- The two strands of DNA thus show complementary base pairing.

- The strands are held together because of hydrogen bonding between the bases in opposite strand.

- One full helical turn involves ten base pairs and the base pairs are stacked  3.4 A apart.

- This form is called as B-form of DNA.

5 0
3 years ago
What is the scientific name for a gorilla
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Vessel that transports deoxygenated blood from lower parts of the body returns to the right atrium via the
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The inferior vena cava brings deoxygenated blood back into the heart from the lower body. For comparison, the part that directs deoxygenated blood from the upper body is the superior vena cava.
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During cold periods, marmots enter a state of torpor which alters their lower critical body temperature. in comparison to the bo
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The answer is A. <span>much more; much shorter than
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A gene that is not expressed when paired with a dominant allele is called alan
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The answer is the recessive allele
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