One species is nocturnal, and the other species is not.
http://quizlet.com/51808791/biology-1407-ch-24-flash-cards/
Answer: B) Arginine
Explanation: Having the sequence (mRNA):
5′-GUUUCCCGUAUACAUGCGUGCCGGGGGC-3, we can go through the following procedure:
1. Identifying the binding site for the initiator tRNA, which is the so-called "start codon" AUG: 5′-GUUUCCCGUAUAC<u><em>AUG</em></u>CGUGCCGGGGGC-3′
2. Look for the next codon after AUG, which is CGU:
5′-GUUUCCCGUAUACAUG<u><em>CGU</em></u>GCCGGGGGC-3
3. Look in a codon table in which amino acid corresponds to CGU. Then you will find that amino acid is Arginine.
The reason you should follow the above procedure is that during translation, ribosomes are in charge of creating a new peptide bond from mRNA using different tRNA. A tRNA is a structure with a codon attached to it and an amino acid. If a tRNA has a UAC codon attached to it, then this tRNA is going to scan the mRNA looking for the corresponding AUG (the so-called start codon). This is why the tRNA with the UAC codon attached to it is called "initiator tRNA". When initiator tRNA finds the start codon, the large subunit of the ribosome would place this tRNA plus mRNA in its so-called P site (Polypeptide site). On the right of the P site is the A site (Amino acid site) which will be waiting for the tRNA which attached codon corresponds to the next codon after the start codon AUG in the mRNA. For this case, that codon which A site is waiting for is CGU, which is attached to a tRNA containing the corresponding amino acid which is Arginine.
<span>The earliest forms of life on earth were photosynthesis? </span><span>Its False.
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A good way to reduce acid rain is use less fossil fuels, as they cause pollution which results in acid rain.
B.) Scientists developed the geologic time scale by studying rock layers and index fossils worldwide. These layers in which the sedimentary rocks are placed, are called Strata, are formed by accumulation, compaction and cementation of sediments. The analysis of the strata, their rock composition, fossil content, disposition, etc., provides valuable data on Earth's past. Dating or absolute age is a numerical value, almost exact. For example, if a rock is said to be 3,000 million years old, it is referring to its absolute age. To know the absolute age of a rock or a stratum, techniques such as radioactive isotope dating must be applied.
