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Stels [109]
2 years ago
15

Which of these is a food web based on the relationships described above? ​

Biology
2 answers:
expeople1 [14]2 years ago
8 0

Answer:

d or b

Explanation:

d or b

Zolol [24]2 years ago
6 0

based on the relationships above the answer is B.

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An organism occupying the 3rd trophic level is best described as a ________. tertiary consumer secondary consumer top carnivore
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Organisms at the third trophic level are secondary consumers. These secondary consumers prey on the primary consumers which are animals that eat plants or herbivores. Secondary consumers are best described as carnivores because they don't eat plants. They only eat animals that consume plants like cows and chicken.
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Limestone is a rock formed from calcite. Calcite can be easily dissolved by acids. Marble is a rock formed from limestone. There
Umnica [9.8K]

Answer:

All of these are correct

Explanation:

According to the question, marble is a rock formed from limestone, which in turn is also formed from Calcite. This shows that marble is a kind of metamorphic rock because a metamorphic rock is any rock that is formed by the alteration of other rocks caused by heat, pressure or chemicals etc. These changes that occurs in the previously existing rocks are called METAMORPHOSIS.

Hence, since marble is formed from limestone, it concludes that marble is a metamorphosed rock formed from a previously existing limestone rock. Also, since Calcite, a precursor of limestone that marble is formed from can be degraded by acids, both limestone and marble which are formed from it will also be dissolvable by acids.

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3 years ago
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Which step can occur even more rapidly by PCR?a. target DNA removed from cells and isolated b. cloning host treated with calcium
lisabon 2012 [21]

Answer:

E. Gene is amplified by multiplication of cloning host

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PCR is a very powerful technique that can help us to amplify exponentially one gene from a very small sample of DNA.

As seen in the attached image, the process begins with a single DNA molecule, for the first cycle, that DNA molecule denaturalizes into two strands, the primers bind to their complementary sides and then the DNA polymerase builds the new DNA strands. The number of copies of the gene that can be obtained with each cycle are 2ⁿ copies, where n is the cycle number.

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