It depends on your teacher, it should be A. It could be B if that’s what your teacher wants but I would go with A.
Develop into<span> gills or other body parts as the embryo </span>develops<span>. </span>backbone<span> ... the embryonic structure in chordates that is </span>usually<span> replaced by a </span>backbone<span>. bony fish.</span>
Answer:
<h2>Biology is a branch of science that deals with living organisms and their vital processes.</h2><h2 /><h2>Three major branches of biology are 1. microbiology</h2><h2>2.Zoology</h2><h2>3.Botany</h2>
<h2>Microbiology is the study of microscopic organisms.</h2><h2>Zoology is the study of animals.</h2><h2>Botany is the study of plants.</h2>
Answer:
"The immune system is made up of special organs, cells and chemicals that fight infection (microbes). The main parts of the immune system are: white blood cells, antibodies, the complement system, the lymphatic system, the spleen, the thymus, and the bone marrow."
Explanation:
