Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 51.4, Problem 1R
Summary Introduction
To review:
The connection between the need to conserve water and evolution of internal fertilization.
Introduction:
Over the course of evolution, habitat of organisms changed from water to land. Earlier the life originated in water and fertilization was external as mode was water. As the life started drifting from water to land, mode of excretion and fertilization started changing.
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How does internal fertilization facilitate life on land?
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Chapter 51 Solutions
Life: The Science of Biology
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- What is the relationship between meiosis and fertilization?arrow_forwardWhy are sea urchins have external fertilization? What are the adaptive advantages of external fertilization? How about internal fertilization?arrow_forwardWhy does external fertilization lead to an increase of genetic variation?arrow_forward
- What are the similarities between plant and animal reproductive organ systems?arrow_forwardWhy enzymes are important in fertilization?arrow_forwardWhat is NOT a disadvantage of internal fertilization? the ability to reproduce on land without needing external water the need for more specialized reproductive structures the production of fewer embryos the reduction in the randomness of fertilization (less genetic variability in offspring)arrow_forward
- Which of the following steps of sea urchin fertilization initiates the formation of the fertilization envelope? A Acrosomal reaction Fast block to polyspermy Egg activation Cortical reaction Chemo-attractionarrow_forward"What is the advantage of internal fertilization over external fertilization and vice versa"?arrow_forwardWhat are the advantages and disadvantages of internal fertilization over external fertilization? How about the advantages and disadvantages of external fertilization over internal fertilization? Enumerate.arrow_forward
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