I'm not sure if I will answer the question you asked, as I many have interpreted it incorrectly. In natural selection, there must be variance in the gene pool, the total frequency of alleles in a population. Now, one of the organisms may have a gene that somehow helps them survive from the selective force much better compared to the others. If this does happen, over time the gene pool will narrow down to become just the genes of that organism that survived better in the first place because the rest would be taken care of by the selective force. So, the alleles and trait come from the first organisms that had the advantage over the others of its species.
Answer:
Radiometric dating methods
Explanation:
Absolute dating is the process of determining an age on a chronological or specified time scale in which events occurred in archaeology and geology. Absolute dating can be determined by using properties of the atoms that make up materials.
The most common method of absolute dating uses by geologists is radiometric dating methods which is based on the natural radioactive decay of certain elements such as potassium and carbon found in the rocks. By comparing the ratio of parent isotope with a known half-life to daughter product in the rock, the age of the rock can be determined.
The carbon-14 isotope is used in radiocarbon dating, but is only useful for measuring recently formed rocks in the geologic past. The decay of Potassium-40 isotope known as potassium-argon (K-Ar) method allows dating of materials that up to 1,000 billion years old.
<span>The answer to the following question would be, Antoine Lavoisier. </span>
At the end of the winter they are most numerous in fresh water. they will cover surface of aquatic plants or poles and wooden borders of ponds. If you like to study them you can scrape the brown growth with a flat piece of plastic. you can also use a sponge. for the free living (plankton) species fine mesh plankton net is very useful.
Answer:
read the explanation.
Explanation:
Both are enzymes, both has active sites because they are enzymes. A difference is that serine proteases has serine aminoacids in it active site. The aspartic proteases has an activated water molecule bond to one or more aspartate aminoacid in its active site.
Serine proteases are two main kinds, chymotrypsin and subtilisin kind. Aspartic proteases are three main kinds, pepsin, cathepsin and renins.
Serine proteases are found either in eukaryotes and prokaryotes, meanwhile the aspartic proteases are found mainly in eukaryotes as molds and yeast but rarely in prokaryotes such as bacteria.
Hope this info is useful.
