Campbell Biology (10th Edition)
Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 46, Problem 10TYU
Summary Introduction

To determine: Why motile species are less often hermaphrodites.

Concept introduction:

Hermaphroditism is a condition in which an organism has both male and female reproductive systems. They produce both male and female gametes, so any two organisms can mate. In hermaphrodites, the gametes produced by meiosis have different genetic makeup than the parent organism.

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What is a dauer larva ? It's a larva from a special variant of C. elegans that was first identified in samples from soil in Germany It is a larva that shows accelerated development in highly nutritious environments Dauer is just the technical term for "hermaphrodite" - so dauer larva means hermaphrodite adult It's a larva that arrests development in a low metabolic and enduring stage, caused by harsh environmental conditions. The larva will remain in the dauer stage until the conditions improve, at which point they'll resume development.
In sea urchin, which step of egg and sperm recognition involves the formation of a fertilization cone?   Sperm binding to the egg's vitelline membrane   Fusion of the sperm and egg membranes   Acrosomal reaction   Chemo-attraction   Sperm binding to the egg's jelly coat
What is "ecdysis"? O The outermost covering of an ovum that undergoes external fertilization. O A form of asexual reproduction The act of emerging out of the old cuticle during molting. The transformation of a larva into an adult that looks completely different from the larval form.

Chapter 46 Solutions

Campbell Biology (10th Edition)

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