{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Study_Guide_2 - Bio 54 Study guide for exam 2 Fall 2004 1...

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

View Full Document Right Arrow Icon
Bio 54 – Study guide for exam 2 Fall 2004 1. In seahorses, males brood their young in a brood patch. In this system, reproductive success of males is limited to the number of young they can successfully provision in their brood pouch. Reproductive success of females is limited to the number of eggs she can produce. Studying a particular species of seahorse, you find that males can brood 100-200 eggs in a season, but that females can produce 400-600 eggs in a season. a. Which sex do you expect to be the choosy sex? Why? b. What benefits might the choosy sex gain by being choosy? 2. Explain how a 50:50 sex ratio is maintained by frequency dependent selection in species like humans. (Hint: Does each sex have an advantage or a disadvantage when rare? Why?) 3. How can the asymmetry between the sexes explain why many fish begin their lives as females, but change sex once they reach a certain size? 4. Consider the tables below that describe levels of relatedness to various kin, and the benefits and costs associated with various altruistic behaviors.
Image of page 1

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

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

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern