1.

    Pseudogenes, non-functional copies of genes, are often considered 'junk DNA.' However, from an evolutionary perspective, they offer valuable insights. Which of the following BEST describes the significance of pseudogenes as evidence for evolution?

    A

    They demonstrate that mutations always lead to loss of function and contribute to genetic degradation.

    B

    They provide a reservoir of genetic material that can be readily reactivated to generate new functional genes.

    C

    Their presence indicates that organisms are actively evolving towards greater complexity.

    D

    They represent a record of past gene duplication events and subsequent loss of function, reflecting evolutionary history.

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    10.

    Correct order is

    A

    Paleozoic oo Archeozoic oo Cenozoic

    B

    Archeozoic oo Paleozoic oo Proterozoic

    C

    Paleozoic oo Mesozoic oo Cenozoic

    D

    Mesozoic oo Archeozoic oo Proterozoic

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