3. Fertilization of the egg in the upper part of the oviduct has always thought to be a means to naturally select the most-fit sperm, weeding out those less fit, unable to complete the journey. However, recent evidence has showed that sperm actually 'help' each other during the ascent by locking tails and pulling other sperm along towards the egg. Describe an alternative hypothesis for fertilization in the upper oviduct to the 'most fit sperm' hypothesis and how would you provide evidence?

Biology: The Dynamic Science (MindTap Course List)
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ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter50: Animal Development
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Problem 9TYK: In the embryonic development of the eye: a. the optic vesicle cells permanently adhere to each other...
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3. Fertilization of the egg in the upper part of the oviduct has always thought to be a means to naturally select the most-fit sperm, weeding out those
less fit, unable to complete the journey. However, recent evidence has showed that sperm actually 'help' each other during the ascent by locking tails
and pulling other sperm along towards the egg. Describe an alternative hypothesis for fertilization in the upper oviduct to the 'most fit sperm'
hypothesis and how would you provide evidence?
4. Hormone-based birth control methods deliver synthetic versions of progesterone in high concentrations or estradiol and progesterone in high
concentrations. Propose a model as to how this action might prevent unwanted pregnancies?
5. In the recent past, the placenta, which is delivered after the birth of a fetus, was discarded as invaluable. Today, millions of dollars are being granted
for rocoarch nhout the placenta for auto-immune diseases and patients receiving organ transplants. Can you think of why both of these different
Transcribed Image Text:3. Fertilization of the egg in the upper part of the oviduct has always thought to be a means to naturally select the most-fit sperm, weeding out those less fit, unable to complete the journey. However, recent evidence has showed that sperm actually 'help' each other during the ascent by locking tails and pulling other sperm along towards the egg. Describe an alternative hypothesis for fertilization in the upper oviduct to the 'most fit sperm' hypothesis and how would you provide evidence? 4. Hormone-based birth control methods deliver synthetic versions of progesterone in high concentrations or estradiol and progesterone in high concentrations. Propose a model as to how this action might prevent unwanted pregnancies? 5. In the recent past, the placenta, which is delivered after the birth of a fetus, was discarded as invaluable. Today, millions of dollars are being granted for rocoarch nhout the placenta for auto-immune diseases and patients receiving organ transplants. Can you think of why both of these different
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