2. Which of the following is the order of layers in the epidermis from superficial to deep?
a. Stratum corneum, stratum granulosum, stratum spinosum, stratum basale
b. Stratum corneum, stratum germinitavium, stratum spinosum, stratum
basale
c. Stratum basale, stratum spinosum, stratum germinitavium, stratum
corneum
d. Stratum basale, stratum spinal, stratum granulosum, stratum corneum

The epidermis consists of several layers beginning with the innermost (deepest) stratum basale (germinatum), followed by the stratum spinosum, stratum granulosum, stratum lucidum (when present), and ending with the outermost layer, the stratum corneum.

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.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.