What causes an adaption in species?

An adaptation is a mutation or genetic change, that helps an organism, such as a plant or animal, surive in its environment. The mutation has become an adaptation. Structural and Behavioral Adaptations. An adaptation can be structural, meaning it is a physical part of the organism.

Explanation:

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 darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.