1. Which is not a characteristic of jawed fishes? a. endotherm
b. gills
c. skin covered by scales
d. two-chambered heart
A

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.

. ph changes the ability of them he enzyme to dissolve in water.

paper covers rock.

explanation:

rock only smashes scissors.