Some organisms that are alive today do not look exactly like organisms that lived in the past. However, if a comparison of DNA samples from two organisms that differ in appearance reveals that the organisms are nearly genetically identical, the samples may be used as evidence for

If it is study island then it is B

Explanation:

B. the theory of evolution, or the theory that characteristics of populations can change over time.

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 answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )