Learning Task 2. Filling the Blanks:

Direction: Fill in the correct word in each blank to complete the sentence.

1. The gradual change in a population’s genetic and physical traits is

called ___________.

2. Both biologists and geologists date the history of the Earth with the help

of the ____________.

3. The greater the similarity in ____________ sequence, the closer the

relationship of the organisms.

4. Scientists have estimated that the Earth is about __________ years old.

5. Fossils are remnants or remains of ______________ organisms​