A researcher is trying to construct a molecular based

Info icon This preview shows pages 6–9. Sign up to view the full content.

View Full Document Right Arrow Icon
22) A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny? A) genes involved in chitin synthesis B) collagen genes C) beta-catenin genes D) genes involved in eye-lens synthesis E) genes that cause radial body symmetry Answer: B 6
Image of page 6

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

View Full Document Right Arrow Icon
Topic: Concepts 32.1, 32.3 Skill: Application/Analysis 23) What is the correct sequence of the following four events during an animal's development? 1. gastrulation 2. metamorphosis 3. fertilization 4. cleavage 24) At which developmental stage should one be able to first distinguish a diploblastic embryo from a triploblastic embryo? 25) At which developmental stage should one be able to first distinguish a protostome embryo from a deuterostome embryo? 26) What may have occurred to prevent species that are of the same grade from also belonging to the same clade? A) similar structures arising independently in different lineages B) convergent evolution among different lineages C) adaptation by different lineages to the same selective pressures D) A and B only 7
Image of page 7
E) A, B, and C Answer: E Topic: Concept 32.3 Skill: Knowledge/Comprehension 27) Organisms showing radial symmetry would likely 28) During metamorphosis, echinoderms undergo a transformation from motile larvae to a sedentary (or sometimes sessile) existence as adults. What differentiates echinoderm adults, but not their larvae? Adults should
Image of page 8

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

View Full Document Right Arrow Icon
Image of page 9
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