2
Question
A baby has been born with a small tail. It is the case exhibiting
A baby has been born with a small tail. It is the case exhibiting
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Solution
The correct option is B Atavism
Retrogressive evolution leads to loss of advanced structures in adults which were present in the embryo stage. For example in tunicate larvae all the chordate characters are present but in the adult they are lost.
Mutations are the changes in the nucleotide sequences of the genetic material.Mutations may arise due to radiations, chemical mutagens, oncogenes etc.
Atavism is the sudden reappearance of some ancestral characters. For example, a human baby born with a tail like vertebrates which has disappeared in recent generations represents the case of atavism.
Metamorphosis is a biological process which involves change in structure and form after birth from immature to adult form.
(C) Atavism
Retrogressive evolution leads to loss of advanced structures in adults which were present in the embryo stage. For example in tunicate larvae all the chordate characters are present but in the adult they are lost.
Mutations are the changes in the nucleotide sequences of the genetic material.Mutations may arise due to radiations, chemical mutagens, oncogenes etc.
Atavism is the sudden reappearance of some ancestral characters. For example, a human baby born with a tail like vertebrates which has disappeared in recent generations represents the case of atavism.
Metamorphosis is a biological process which involves change in structure and form after birth from immature to adult form.
(C) Atavism
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