Once the organism dies the amount of carbon-14 decreases exponentially.
The exponential, radioactive decay of carbon 14 is used to estimate the death dates of organic material.
Living organisms have approximately the same ratio of C12 to C14 in their tissues. Once the organism dies C14 decays into nitrogen 14. Decay of C14 to nitrogen 14 changes the ratio of C12 to C14. The ratio of C12 to C14 in dead material can be compared to the ratio when the organism was alive to estimate the date of its death. Radiocarbon dating can be used on different samples such as bone, cloth, wood and plant fibers.
Answer:
1,95,000 dollars
Explanation:
The recorded value of any commodity depends on the following elements:
- The instance value of the commodity on a page
- Additional value paid for buying the commodity and
- Other expenditure related to purchase of commodity
Here in this case, the recorded value of the truck is equal to the sum of trade allowance and additional payment to acquire new truck
Thus, recorded value of truck
B. 1pm in October
Lowest ozone levels ever recorded are in early October and in the pm (noon to 6 pm) air pollutions is at its lowest levels.
Answer:
The DNA strands are not free in the nucleus, but forming a compact structure called chromatin along special proteins, known as histones. The chromatin structure has an important role in gene expression, as the level of compaction and the histone modification act as signals for the transcription machinery
In order to be transcribed, different areas in the genome need to unfold from the histone proteins, so the RNA polymerase can access the DNA.
That means, <u>that DNA sequences that transcribe at high rate, are more often unfold from the histones, and more exposed to other proteins to bind them. Particularly, those areas are more sensitive to the attack of endonucleases, such as DNAse I.</u>
As a consequence, an assay of DNAse I digestion can be used to identify highly sensitive or resistant to DNAse cleavage areas in the genome, and therefore serve as an insight to which sequences are more and less transcriptionally active.
Explanation: we will conclude this by the following characteristics:
1.organims that lack a proper nucleus.
2.they have membrane bounded organelles
3.they are tiny single cell oraganisms which cannot be seen by naked eye.
4.they are the oldest livinh organisms on earth
5.they are present in very harsh conditions like volcanic vents or at the bottom of the sea
