When a thin plant or animal leaves an impression in sediment that becomes sedimentary rock, this is a fossil.

Petrified fossils

Explanation:

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

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.