7) The wings of a butterfly (membranous) and the wings of a bird (bony and cover

Question

7) The wings of a butterfly (membranous) and the wings of a bird (bony and covered with feathers) have similar functions but may have different evolutionary origins and different patterns of development. Butterfly wings and bird wings are examples of a) homologous 8) The class of vertebrates is believed to have had common ancestry mainly because a) all lfe arises only from pre-existing life. b) some members of each class are aquatic. c) there are marked similarities among their embryos d) warm-bloodedness developed among the classes of vertebrates 9) The finding of gill slits in the embryo of the pig supports the theory of a) regeneration b) common ancestry of the vertebrates c analogy d) survival of the fittest 10) The suggestion that all vertebrates probably have a stock of genes in common with one another is supported most strongly by the a) hard-shelled eggs of birds and reptiles. b) two-chambered hearts of fish c) observance of structural similarities. d) theory of mutation. 11) The appendix, ear muscle, and coccyx (tail bone) in humans are examples of a) homologous structures b) fractures c) vestigial structures (d) adaptations structures b) analogous structures e) vestigial organs d) fossils

Explanation / Answer

7. Analogous organs

as analogous organs have similar function but different structure.

8. c) they have similarities in their embryos

9. b) common ancestry of vertebrates

11. c) vestigial structures. Structures which are not used anymore.

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