Question

Why are primarily childhood cancers like Leukemia and Lymphoma not as clearly connected to the Atavistic Hypothesis?

A. The Atavistic Hypothesis explains cancer as a failure to check cell proliferation.

B. The Atavistic Hypothesis doesn't apply to cancers that are unrelated to organ or tissue development.

C. There is intense selection for high rates of recombination and point mutations in certain cells in the immune system (beneficial to fighting off pathogens), despite the possibility of leukemia and lymphoma.

Answer 1

Answer- B. The Atavistic Hypothesis doesn't apply to cancers that are unrelated to organ or tissue development.

Explanation-

An atavism is the phenomenon in which a phenotypic trait (which are related to formation of tissues and organs) reappears in an organism after a period of absence. An atavism refers to a trait that is not present in the immediate predecessors of an individual, although was existent in its ancestors.

And Leukaemia and Lymphoma are neither related to formation of tissues or organs and not they are ancestral traits. Therefore these types of cancers are not realted to Atavistic Hypothesis.