Describe one of the main challenges in extracting dna from cells found at a crime scene.

There can be many challenges while collecting DNA from the cells that is found at the crime scene.

One of the main problem is the minute amount or less amount of DNA that is found at the time of crime scene. this small amount is not sufficient for the reactions that is carried out.

Even PCR needs a detectable amount of DNA for the reactions to take place. The DNA that is found is contaminated most of the time. It is made of protein which gets denatured and then it becomes useless.

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1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.