Not all of the human genome code for proteins. Which of the following characteristics describes about 50 percent of the human genome ? A( Genes that code for proteins
B( Sequences that regulate genes that code for proteins
C( Genes that code For RNA molecules
D( highly repetitive sequence
E( imprinted sequences

i think its c. amphipod

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.