Answer: D. Weathering breaks down rock and other material
Explanation:
Because weathering/erosion cause rocks to break down into tiny sediments over time
Answer:
Virus can survive independently for many years.
Explanation:
independently because they cant live if they cant connect to the host cell
Once the DNA of a person has been copied it can be compared to the DNA of other people by using PCR (Polymerase Chain Reaction).
Answer:
No help is received in 30 minutes. A person with A type of Blood safely received type O Blood No.
Explanation:
O blood group people in the world is only few left 100 people in blood group O
