Answer:
the answer is all of the above
Earths lithospere is solid and sits on top of the softer asthenosphere.
Explanation:
A protein is a linear molecule comprised of amino acids.The sequence of a protein's amino acids is determined by the sequence of bases in the DNA coding for the synthesis of this protein.
Through my research I found matching questions with similar answers:
A) macrophages
B) antigens
C) antibodies
D) lymph
The best answer to fill in the blank would be the third option C) Antibodies which in the name anti means against, so since the word anti is the same as against, its a battle between antibodies and invaders, so that's why its C).