PCR (polymerase chain reaction) is a relatively new advance (1980's) but it has a great impact in our lives. Specifically, in forensic science, PCR is useful in many sorts of crimes . Up until the PCR method, in order to identify a person forensic scientists would use fingerprints or some other ambiguous methods like teeth marks etc. But now, with PCR, we can compare the genetic material found on a crime scene and compare it with a suspect's genetic material, definitively concluding whether they are the same person or not. The way this works is that we collect a sample from the crime scene with DNA and then PCR amplifies the quantity of DNA in that sample. One of the apparent advantages of this method is that PCR works with even a very small sample, often not even a single cell is required. This makes crime scenes full of information. Hence, succinctly, PCR has helped modern forensic science in that:
1) its results are more definitve than traditional identification methods and subject to less ambiguity
2) it is relatively fast
3) new pieces of evidence can be of value (like some hair cells) and identify the crominal in cases that in older times would be impossible to solve.
B. synapomorphy
A synapomorphy is a shared apomorphy that distinguishes a clade from other organisms.
A clade also known as monophyletic group, is a group of organisms that consists of a common ancestor and all its lineal descendants, and represents a single "branch" on the "tree of life".
Answer:
What gives the athlete action are the waves of chemical and electrical charges. These charges move along the neuron and when the nerve impulses, the electrical charges across the cell membrane reverses and charges high speeds. The environmental and behavioral factors which led to Joseph's dehydration event are: For one, FLORIDA. Forget it being August and still hot. It's January, 80 degrees during winter are you kidding me?! On a serious note, the hot and dry weather caused extreme heating in Joseph's body and the loss of water in his bloodstream via sweat, this in combination with strenuous physical work during his three hour game. His inability to rehydrate caused him to experience symptoms of heat illness: dehydration, muscle pain and cramping The opening of the potassium and sodium gate was caused by the brief bonding in the motor end plate. When these two are open in the same duration, End Plate potential is present. The adjoining muscle regions are stimulated to create action potential instead of actually creating the action potential. With the lack of sodium because of the sweating with no rehydration, the sodium gate didnt open right and thats where the imbalance occurs.The gates opened at different times and caused Joseph's cramping.
Explanation:
B) Primary is where there is nothing no rock or soil
