Quiz.1.10.key-1 - BIO 325H: Quiz 1 Spring 2010 Name_KEY_...

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

View Full Document Right Arrow Icon
BIO 325H: Quiz 1 Spring 2010 Name___ KEY_ _____________________________ You have 10 minutes to take this quiz. Read each problem carefully and make sure that you fully answer the questions asked. Good luck! 1. (2 pt.) We talked about several misconceptions concerning adaptive evolution via natural selection. Give and explain one reason why this misconception is wrong. “Natural selection is always improving a species.” There were several answers you might have given here. 1. Natural selection is not forward looking. The next generation has been selected for the conditions that the previous generation experienced. So if the environment changes from one generation to the next, the next generation will not necessarily be more fit in the new environment. 2. Selection can only cause a species to become better suited to its environment if the species has genetic variation that produces phenotypes that vary in their fitnesses in the environment. If the species lacks genetic variation for traits that affect fitness, then
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.

Page1 / 2

Quiz.1.10.key-1 - BIO 325H: Quiz 1 Spring 2010 Name_KEY_...

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