As the collection of physical evidence begins
a. the police chief has primary responsibility of maintaining the chain of custody.
b. all observations should be recorded through photographs, sketches and notes.
c. the district attorney should be consulted for admissibility of physical evidence in court.
d. the medical examiner should oversee the collection of the evidence at the crime scene.
5.the most important prerequisite for photographing a crime scene is:
a. for items to be placedinto indirect light so that nuances can be picked up in the photograph.
b. for the crime scene to be in an unaltered condition.
c. for the photographer to start with close-ups of any important object and back up to get the full scale.
d. for rulers or other items to be placed into the photographs to show scale.

d.The medical examiner should oversee the collection of the evidence at the crime scene.

Explanation:

The physical evidence includes all the evidences which shows the proximity of victim or culprit with the crime scene. The medical examiner should help in collection of the evidences at the scene of crime. The medical examiner can search and identify physical evidences such as blood, sweat, vomit, fecal matter, urine, bodily tissues as an evidence and can begin the process of collection without contamination.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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