Answer:
All of the above traits combined
Explanation:
Phylogeny is an evolutionary history of development of a certain species or taxonomic group.
The purpose of phylogenies is to represent evolutionary relationships among a group of organisms.
During the reconstruction of phylogenies. Systematists often use a variety of traits in order to produce a good estimate of a phylogeny.
The use of molecular traits, gross morphological traits, behavioral and biochemical traits combined can give a good estimate of a phylogeny.
It can be observed and tested
Answer:
increasing extension time
Explanation:
The Polymerase Chain Reaction is a technique widely used in molecular biology laboratories to amplify target DNA regions. The standard steps of a PCR are as follow 1-denaturation, 2-annealing and 3-elongation/extension. These steps are repeated 15-40 times in order to exponentially amplify the linear DNA fragment. It is well known that longer extension times can be used as a strategy to increase the yield of longer PCR products. This is because the extension time depends on the synthesis rate of the DNA polymerase used in PCR technique and the length of the DNA fragment to be amplified.
