Animals which lay eggs are called _____

(a) Viviparous

(b) Oviparous

(c) Both a and b

(d) None of the above

Animals that lay eggs are referred to as oviparous creatures. So, the correct answer to your question is (b) Oviparous. Let’s delve a bit deeper into what this means and how it contrasts with other reproductive strategies.

Understanding Oviparous Animals

Oviparous animals are those that reproduce by laying eggs, from which their offspring hatch after a period of development. This group includes a wide variety of species, such as birds, reptiles, amphibians, and many fish. The eggs can be laid in different environments, depending on the species, and they often have protective shells or membranes to safeguard the developing embryo.

Examples of Oviparous Animals

• Birds: Most birds, like chickens and eagles, lay eggs that are incubated until they hatch.
• Reptiles: Turtles and snakes are classic examples; they lay eggs on land or in water.
• Amphibians: Frogs and salamanders typically lay eggs in water, where they undergo metamorphosis.
• Fish: Many fish species, such as salmon and trout, also reproduce by laying eggs in aquatic environments.

Contrasting with Viviparous Animals

In contrast, viviparous animals give birth to live young instead of laying eggs. This group primarily includes most mammals, such as humans, dogs, and whales. In viviparous reproduction, the embryo develops inside the mother’s body, receiving nutrients directly from her, which often leads to a higher survival rate for the young.

Key Differences

• Development: Oviparous animals develop outside the mother, while viviparous animals develop inside.
• Nutritional Source: Oviparous embryos rely on the yolk in the egg, whereas viviparous embryos receive nutrients through the placenta.
• Examples: Oviparous includes birds and reptiles; viviparous includes mammals.

Conclusion

In summary, the term for animals that lay eggs is oviparous, distinguishing them from viviparous animals that give birth to live young. Understanding these reproductive strategies helps us appreciate the diversity of life and the various adaptations that different species have developed to ensure the survival of their offspring.