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TLS Online TPP Program

#Question id: 4698

It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that

#Section 2: Evolution

  1. island forms and mainland forms descended from common ancestors.

  2. common environments are inhabited by the same organisms.

  3. the islands were originally part of the continent.

  4. the island forms and mainland forms are converging.

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TLS Online TPP Program

#Question id: 4944

#Section 2: Evolution

What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?
TLS Online TPP Program

#Question id: 4945

#Section 2: Evolution

Which is a defining characteristic that all protobionts had in common?
TLS Online TPP Program

#Question id: 4946

#Section 2: Evolution

Although absolute distinctions between the ʺmost evolvedʺ protobiont and the first living cell are unclear, biologists generally agree that one major difference is that the typical protobiont could not
TLS Online TPP Program

#Question id: 4947

#Section 2: Evolution

The first genes on Earth were probably
TLS Online TPP Program

#Question id: 4948

#Section 2: Evolution

RNA molecules can both carry genetic information and be catalytic. This supports the proposal that 
TLS Online TPP Program

#Question id: 4949

#Section 2: Evolution

What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?