Shark Reproduction

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Questions and Answers

A shark embryo develops inside the uterus and receives nourishment through a yolk sac placenta. Which reproductive strategy does this represent?

Viviparous (correct)
Ovoviviparous
Parthenogenesis
Oviparous

Which of the following is a key characteristic of ovoviviparous shark reproduction?

The embryo is nourished by the mother's blood via a placenta.
Embryo development occurs externally in a nest.
The embryo develops in the uterus and is nourished by the egg yolk. (correct)
Fertilization occurs externally.

In sharks, what is the function of the cloaca?

Organ for osmoregulation.
Primary site for nutrient absorption.
Common exit point for the reproductive, excretory, and digestive systems. (correct)
Specialized respiratory organ.

A species of shark lays eggs that hatch outside of the mother's body. How would this reproductive strategy be classified?

<p>Oviparous (C)</p> Signup and view all the answers

How does the viviparous reproductive strategy in sharks differ from the ovoviviparous strategy?

<p>Viviparous embryos receive nutrients from the mother via a placenta, while ovoviviparous embryos are nourished by the egg yolk. (C)</p> Signup and view all the answers

Flashcards

Oviparous

Eggs hatch outside the mother’s body.

Ovoviviparous

Embryo develops in uterus, nourished by egg yolk.

Viviparous

Embryo develops in uterus, nourished by placenta.

Cloaca

Common chamber for reproductive, excretory, and digestive systems.

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Study Notes

Shark eggs undergo internal fertilization.
Embryo development varies, leading to three classifications: oviparous, ovoviviparous, and viviparous.
Oviparous sharks lay eggs that hatch outside the mother's body.
Ovoviviparous sharks have embryos that develop in the uterus, nourished by the egg yolk.
Viviparous sharks have embryos that develop in the uterus and are nourished via a yolk sac placenta connected to the mother's bloodstream.
The reproductive, excretory, and digestive systems converge into a cloaca.