The north and south fought for their rights of owning slaves. The south was for slavery, and the north was very against it. Many people died, and the north won
<span>Alfred Wegener proposed the theory of continental drift at the beginning of the 20th century. His idea was that the Earth's continents were once joined together, but gradually moved apart over millions of years.</span>
Answer:
The correct answer is- b. P: coughing; C: saliva; B: complement system
Explanation:
Body show physical, chemical and immunological response against foreign antigen to protect the body from them. Coughing, sneezing, skin, respiratory tract, gastrointestinal tract comes under physical barrier. They restrict the bacteria to get into the body.
Chemical barrier includes saliva, tear, sweat, mucus that helps in killing the pathogen at the outer body surface. Antibodies, immune cells, complement system comes under immune response which helps in destroying the pathogen which are present in the body.
Answer:
Row 2
Explanation:
amino acids link together to make proteins