A female fly, full of fertilized eggs, is swept by high winds to an island far out to sea. She is the first fly to arrive on this island, and the only fly to arrive in this way. Thousands of years later, her numerous offspring occupy the island, but none of them resembles her. There are, instead, several species each of which eats only a certain type of food. None of the species can fly, for their flight wings are absent, and their balancing organs (i.e., halteres) are now used in courtship displays. The male members of each species bear modified halteres that are unique in appearance to their species. Females bear vestigial halteres. The ranges of all of the daughter species overlap.In each fly species, the entire body segment that gave rise to the original flight wings is missing. The mutation(s) that led to the flightless condition could have

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#Question id: 27935

#Unit 11. Evolution and Behavior

Evolution of birds from dinosaurs are showing which type of evolution?

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#Question id: 688

#Unit 1. Molecules and their Interaction Relevant to Biology

Pauling and Corey’s studies of the peptide bond showed that:

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#Question id: 19332

#Unit 12. Applied Biology

Which one of the following transducers is a self-generating type transducer?

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#Question id: 28231

#Unit 5. Developmental Biology

which of the following stem cells play major roles in organisms Such as hydra, axolotl, and zebrafish with high regenerative capabilities?

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#Question id: 28419

#Unit 5. Developmental Biology

A 1-cell-thick area in the center of the avian blastoderm that forms most of the actual embryo is called___