Evidence of evolution

Humans have been improving crop species for thousands of years by cross-breeding plants with desirable characteristics. The photograph shows the changes in dry cobs of corn (Zea mays) over 10 000 years. What is the name of the process that was used to produce modern corn?

• Selective breeding

• Adaptive radiation

• Discontinuous variation

• Natural selection

What could be used as evidence for evolution?

I. Selective breeding of domesticated animals

II. The fossil record

III. Homologous structures

• . I and II only

• I and III only

• II and III only

• I, II and III

The pentadactyl limbs of mammals, birds, reptiles and amphibians are examples of which kind of structures?

• Homologous

• Analogous

• Vestigial

• Convergent

What are the evolutionary origins and functions of homologous structures?

• Evolutionary Origin: Common or different Origin.

  Function: Same Function.

• Evolutionary Origin: Common Origin.

  Function: Same or different function.

• Evolutionary Origin: Different Origin.

  Function: Same Function.

• Evolutionary Origin: Different Origin.

  Function: Same or different function.

Which of these structures is not homologous?

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