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VLD [36.1K]
3 years ago
9

Use this dichotomous key for insect identification to identify the insect shown. 1. a. Insect has one pair of wings. Order Dipte

ra b. Insect has two pairs of wings. Go to #2 2. a. Front wings thicker in texture than hind wings Go to #3. b. Front and hind wings are same texture throughout. Go to #4 3. a. Front wings are short Order Dermaptera b. Front wings cover entire abdomen Order Coleoptera 4. a. Wings with scale on all parts of their area. order Lepidoptera b. Wings without scales Go to #5. 5. a. Hind wings smaller than front wings. Order Ephemeroptera b. Front and hind wings nearly equal in size. Order Odonata An insect with 2 pairs of wings is standing on a branch. The insect pictured is in the order Diptera. Ephemeroptera. Coleoptera. Odonata. WILL GIVE BRAINLIEST ANSWER asap
Biology
1 answer:
Amanda [17]3 years ago
7 0

Answer:

The correct answer is Odonata.

Explanation:

Dichotomous key is an instrument that permits users to decide or identify the organism correctly in the natual world. It is utilized in distinguishing plant and creature species dependent on their characters.

Using the key :

the Odonata has following characters

1.  Insect has two pairs of wings. so go to 2

2. Front and hind wings are same texture throughout. so go to 4

3.  Wings without scales so Go to 5

4.  Front and hind wings nearly equal in size so 5b that is Odonata.

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photosynthesis produces oxygen and glucose as the end products whereby the glucose is used as food by plants and oxygen as a byproduct.

cellular respiration produces water and carbon dioxide and the end products and by products where by energy is stored

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2 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.

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