Why did some soapberry bugs have long beaks prior to 1940?

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Why did some soapberry bugs have long beaks prior to 1940?

2007-04-02 09:41:26 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Biology

2 answers

The variations in beak forms could be explained by the Finch beak evolution by Darwin (adaptation)

2007-04-02 09:56:38 · answer #1 · answered by michaelbagel 2 · 0⤊ 0⤋

The bugs used to feed on different food. When they switched to food from an introduced plant, the beak size changed. There's a good explanation with illustrations about halfway down on this page:

http://www.fiu.edu/~biology/pcb4674/CH2.EVIDENCE.FALL_2005/chapter2_spr_2004.html

2007-04-02 16:47:25 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋