How Do Scientists Calibrate a Molecular Clock for a Group

question 63

Multiple Choice

How do scientists calibrate a molecular clock for a group of organisms with known nucleotide sequences?

• A)They analyze fossilized DNA of known age and compare its nucleotide sequences to modern DNA sequences.
• B)They graph the number of nucleotide differences against the dates of evolutionary branch points known from the fossil record.
• C)They use radioactive isotopes to measure the age of DNA material directly.
• D)They measure protein differences.Evolutionary rates in proteins are well- known and can be used to check results obtained using nucleotide sequences.

---

Definitions:

James D. Thompson

A scholar known for his contributions to organizational theory, particularly regarding organizations as open systems.

Interdependence

A condition where entities are reliant on each other to achieve their goals or maintain existence.

Mediating Technology

Technology that facilitates communication and interaction between individuals or groups.

Interdependent

Being interdependent means entities or individuals are mutually reliant on each other, where the actions of one affect or are affected by the other.