Out of the following give choices;
a. All DNA strands
contained only the heavy nitrogen isotope.
b. Half of the DNA strands contained only the light nitrogen
isotope.
c. All DNA strands contained both heavy and light nitrogen
isotopes.
d. All DNA strands contained only the lighter nitrogen
isotope.
The answer is b. Meselson–Stahl experiment demonstrated the semi-conservative model of DNA replication.
When DNA is replicated, one strand of the new double
helix strand is the parent's strand while the other is the newly synthesized
one. This made the semiconservative model stand out over the other two, dispersive
and conservative models.
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

Answer:
we usually need to measure changes in population abundance, bead representing specific variant can be recovered
The correct statement is that "Archaea are older organisms than eukaryotes"
- Archaeans are group of organisms classified under the domain Archaebacteria. They are found in environments with extreme conditions e.g. high temperature etc.
- They are prokaryotic in nature i.e. they do not possess a membrane-bound nucleus in their cells.
- Based on this, archaea are not classified under the same domain as bacteria (domain- protista). They are unicellular organisms.
- However, archaea are older set of organisms than eukaryotes. This is the correct statement among the options provided.
Learn more: brainly.com/question/1475001?referrer=searchResults
Those are examples of ecosystem services! Hope this helps:)