1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nady [450]
3 years ago
11

Quartzite forms when magma presses against preexisting rock. Heat and pressure change the rock.Quartzite is formed from

Biology
2 answers:
tamaranim1 [39]3 years ago
6 0

Answer:The correct answer would be contact metamorphism.

Explanation:

Luda [366]3 years ago
4 0

<span>The answer is contact metamorphism. Quartzite is formed from sandstone which is usually grey or white in color while quartzites range in shades of pink to red depending on the amount of iron oxide in the stone. Other colors are brought about by other minerals present in the rock. The sandstone is usually a sedimentary rock but after the metamorphism the structure is different and the layers cannot be discticitve. </span>






You might be interested in
Jupiter has no _______, while Uranus, with a spin axis tiled 98 degrees, has the most extreme ones.
Kamila [148]

Answer:

The correct answer is

Option C. Season.

Explanation:

Jupiter has no seasons, while Uranus, with a spin axis tiled 98 degrees, has the most extreme ones. Tilting of planets are responsible for season. If there is very low tilting, the seasons are not present. In jupiter the tilting is very low that is 3 degree so that's why jupiter has no seasons. In earth, the seasons are present due to high tilting i. e. 23 degree.

6 0
3 years ago
From a chemical view, how is an amino acid is being recognized by its specific aminoacyl tRNA synthetase?
hammer [34]

During translation, rRNA and tRNA read mRNA in 5´ to 3´ direction. According to the codons being readen, tRNA transfers the correct amino acids to build the polypeptide chain. A codon is a short sequence of three nucleotides that store the genetic information for the aminoacids´ assembly.

Each tRNA has two important sites. One of them that couples with the codon of the mRNA molecule, named anticodon. The other site couples with an amino acid through the action of the aminoacyl-tRNA synthase enzyme. The whole complex, amino acid + enzyme + tRNA is named aminoacyl-tRNA.        

Each tRNA is recognized by a specific aminoacyl-tRNA synthase enzyme. The enzyme is also capable of recognizing a specific amino acid. Let us say, for instance, that <em>tRNA is specific for phenylalanine.</em> The molecule is attached to the <em>enzyme that is specific for that tRNA(Phe)</em>. Then, when the enzyme and tRNA(Phe) are together, they get to <em>find phenylalanine</em>. The <em>enzyme links the aminoacid to the RNA</em>. Once the whole complex is formed, the <em>tRNA gets to pair its anticodon with the mRNA codon</em>. This is,

  1. Recognition of enzyme and the specific tRNA(aa) ⇒ aa being aminoacid
  2. Recognition of enzyme and the specific aminoacid
  3. Linkage of the aminoacid to RNA by the enzyme action
  4. Pairing of tRNA anticodon to mRNA codon.

Considering that there are twenty amino acids available, there are also twenty complexes of aminoacyl-tRNA, one for each amino acid. Each of the mRNA codons represents one of the 20 amino acids used to build the protein. Each amino acid can be codified by more than one codon. Of the total 64 codons, 61 codify amino acids, and one is a start codon. The left three codons are stopping translation points.

tRNA decodes genetic information from the nucleotidic sequence in the mRNA molecule and allows amino acids to align composing the new protein.  

Once the new peptidic link joins, placing together the new amino acid to the growing peptidic chain, the binding between the amino acid and the tRNA molecule breaks. The tRNA is now free to join another amino acid and repeat the cycle.

In conclusion, a specific aminoacyl-tRNA synthase enzyme recognizes a tRNA, which is also specific for a certain amino acid. When together, the enzyme recognizes the amino acid and links it to the RNA. The whole complex is known as aminoacyl-tRNA. Once the tRNA is joined to its amino acid, it gets to pair a codon of mRNA to add that amino acid to the new synthesizing protein.

6 0
3 years ago
A scientist is studying the age structure of a small country, which is shown in the following diagram.
uysha [10]

Answer:

A :The population of the country is increasing at a rapid rate.

Explanation:

trust :)

4 0
2 years ago
Animals with a special rod or notochord are called _____.
Mashcka [7]
The answer is Chordates.
3 0
3 years ago
How many genes to dihybrids compare?<br><br> 1<br> 4<br> 3<br> 2
Gre4nikov [31]

Answer:

1

Explanation:

Therefore, a dihybrid organism is one that is heterozygous at two different genetic loci. In 1865, Gregor Mendel performed dihybrid crosses on pea plants and discovered a fundamental law of genetics called the Law of Independent Assortment.

4 0
2 years ago
Other questions:
  • Help please need answer asap
    9·1 answer
  • A scientist investigates two types of cells located in different parts in the human body. Cell A contains many more mitochondria
    7·2 answers
  • If the child is a daughter , what is the probability that she will have ichtyosis
    6·1 answer
  • Two of the following statements are false. Circle the letter and fix each statement to make it true.
    9·1 answer
  • Secondary succession occurs in ecosystems without soil. Please select the best answer from the choices provided T F
    6·2 answers
  • What are the different types of ecosystems?
    8·1 answer
  • What did Louis Pasteur's experiment contribute to cell theory?
    15·2 answers
  • What are some of the results of too much sun exposure? What are some ways you can protect yourself from harmful sun exposure?
    8·2 answers
  • What are the 2 parts to an experiment?
    10·2 answers
  • At night, the concentration of carbon dioxide in the air in a forest is high. What is the main reason for this?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!