LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is the most effective way to determine if two species are closely related?
A
Compare their body structures
B
Compare the habitats in which they live
C
Compare the food that the two species eat
D
Compare their DNA sequences
Explanation: 

Detailed explanation-1: -The global alignment technique is appropriate for comparing portions of genomic sequences from two species that are expected to share similarity over their entire length, such as conserved segments.

Detailed explanation-2: -Comparative genomics is a field of biological research in which researchers use a variety of tools to compare the complete genome sequences of different species. By carefully comparing characteristics that define various organisms, researchers can pinpoint regions of similarity and difference.

Detailed explanation-3: -In general, we can compare two sequences by placing them above each other in rows and comparing them character by character. This way we could align two different audio recordings of a piece of music.

Detailed explanation-4: -Molecular clocks are used to determine how closely two species are related by calculating the number of differences between the species’ DNA sequences or amino acid sequences. These clocks are sometimes called gene clocks or evolutionary clocks.

Detailed explanation-5: -The deoxyribonucleic acid (DNA) of closely related organisms would be more similar to each other as compared to distantly related organisms. This is because closely related organisms share a common ancestor and may have similar traits or characteristics. Such organisms also retained lesser mutations over time.

There is 1 question to complete.