Biology is the study of life so a Biologist would study biology: the study of life and living things.
Answer:
0.2.45,,,20.45,5
Explanation:
getting 20 percent of 45 can be expressed in different ways giving different values
Answer:
d. They always invade the human body from the external environment
Explanation:
Antigens are the molecules that have the ability to stimulate immune response and are mostly protein in nature. However, an antigen may be self or non-self molecule.
This means that antigen may enter the human body from the external environment (the non-self antigen) or any molecule present inside the body may serve as antigen (self-antigen). Self-antigens are responsible for autoimmune disorders.
Explanation:
the ways to increase transcription of DNA is O methylation de-acetylation