Answer:
Explanation:
Antibodies have three main functions: 1) Antibodies are secreted into the blood and mucosa, where they bind to and inactivate foreign substances such as pathogens and toxins (neutralization). 2) Antibodies activate the complement system to destroy bacterial cells by lysis (punching holes in the cell wall).
Answer:
D Natural selection
Explanation:
This is because the dominant Gene according to Charles Darwin is strong enough to adapt to any environment.Making it a survival of the fittest
B.
Humans are also part of ecosystems and if they cease to exist, human well being will be affected.
C- Section, also known as a caesarean section.