Answer:
1) Stem cells can renew themselves by dividing into more stem cells more than once.
2) There are two types of stem cells: adult and embryonic stem cells.
3) Stem cells are not specific to one area in the body and can turn into skin, bone, blood or brain cells.
Invasive aquatic species, like the zebra mussel, attach themselves to the hull of ships and are blasted off when the ships release their ballast after unloading cargo.
A mutation is a change in a DNA sequence brought about either by a mistake made when the DNA is copied or through chemical damage. Regions of the genome (called genes) provide instructions for creation of protein molecules, which perform most of the important jobs in cells. Certain types of mutations are silent and have no effect, but others affect protein production in a variety of ways.
Answer – A questioned Sample
In forensic science, a sample that is obtained from the scene of a crime is called a questioned sample. During the investigation, questioned samples would be compared to a known sample to test for similarities which may serve as evidence.
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