Answer: DNA
Explanation:
A chromosome is a thread-like material with a long structure found in the cell nucleus. It mainly contains DNA and proteins. Due to the presence of DNA in chromosomes, it carries several genes.
The total number of chromosomes in human cell is 46: 44 are non-sex chromosomes while 2 are sex chromosomes
He based his hypothesis on a statement made by a dairymaid.
Answer:
pathogens
Explanation:
pathogens may occur in various way e.g spread from a person to person by directly body contact
Doesn’t normally happen until your 40’s or 50’s
