Gases can be produced by normal flora (bacteria that normally lives in the intestines) and harmful bacteria as well.
Cancer is the noncommunicable disease
The
term used to describe features that has been modified from an ancestral form is
evolution. It is a biological change by which descendants come to differ from
their ancestors. In addition, an individual inherits features called traits from its parents through genes and these genes can
produce a new trait in their offspring.
