PS2 - Bios 101 Problem Set 2 Please type these on separate sheets of paper They are due in discussion It is imperative that none of your answers

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Bios 101, Problem Set 2 Please type these on separate sheets of paper. They are due in discussion. It is imperative that none of your answers have been copied directly from another student or from an outside source. 1. (1 point) A population of Melanopus grasshoppers reaches very high densities, and is subjected to aerial spraying by parathion, a pesticide. The following year, the grasshoppers are not observed at all. An outbreak occurs two years later, however, and this time, the aerial spraying with parathion is much less effective. Laboratory tests indicate that these grasshoppers are resistant to parathion, and can ingest significant amounts of it without dying. It also seems that these grasshoppers have a reduced growth rate and lower fertility than grasshoppers from previous years. What type of evolutionary event has occurred here? How could you test your idea? 2. (1 point) Go online and look up two cases of allopatric speciation, and at least one probable case of sympatric speciation. What types of geographic barriers were involved in your cases of allopatric speciation? What was the mechanism of sympatric speciation?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/11/2010 for the course BIOS 101 taught by Professor Molumby during the Spring '08 term at Ill. Chicago.

Page1 / 2

PS2 - Bios 101 Problem Set 2 Please type these on separate sheets of paper They are due in discussion It is imperative that none of your answers

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online