Answer:
The hemocytoblast  (option B) are the parent cell for all formed elements of blood
Explanation:
All blood cells are originated from a common stem cell, which is called a pluripotent stem cell. It is capable of giving rise to any of the blood cells maintaining its existence through mitosis. By dividing pluripotent stem cells, new cells are originated, which become multipotent and differentiate into lymphoid (NK cell and the polymorphonuclear cell) or myeloid cells (megakaryocite); always respecting the original quantity. 
 
        
             
        
        
        
Answer: C
Explanation: the application of scientific knowledge for practical purposes, especially in industry
 
        
             
        
        
        
Diffusion is the passive transport from a high concentration to a low without using energy. homeostasis results from balance.
        
             
        
        
        
This is copied what google: 
“Paleoanthropology, also spelled Palaeoanthropology, also called Human Paleontology, interdisciplinary branch of anthropology concerned with the origins and development of early humans.” 
I think it’s basically: a branch of anthropology, the study of the development and origins of early human beings.