LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

DIVERSITY AMONG LIFE FORMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Molecular homology refers to
A
similarities in DNA and proteins among organisms of different species
B
the evolution of two or more interdependent species, each adapting to changes in the other
C
similarities in the early embryo development among vertebrates
D
organisms that have been preserved in the rock
Explanation: 

Detailed explanation-1: -homology, in biology, similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor.

Detailed explanation-2: -Because the DNA sequence determines a protein’s amino acid sequence, a gene shared by two closely related organisms should have similar, or even identical, amino acid sequences.

Detailed explanation-3: -Homologous features If two or more species share a unique physical feature, such as a complex bone structure or a body plan, they may all have inherited this feature from a common ancestor. Physical features shared due to evolutionary history (a common ancestor) are said to be homologous.

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