Question

Offspring of oviparous animals are at a greater risk of survival as compared to those of viviparous animals because
a. Proper embryonic care and protection is absent
b. Embryo does not develop completely
c. Progenies are of smaller size
d. Genetic variations do not occur

Answer 1

Hint: Oviparous animals are egg-laying creatures that bear young in the egg phase of advancement and youthful ones are created outside the female body. Viviparous creatures bear living youthful phases inside the body of the mother thereby getting a more noteworthy endurance rate.

Complete answer:
Oviparous creatures lay eggs outside their body. Subsequently, the eggs of these creatures are under persistent danger from different ecological elements. Then again, in viviparous creatures, the improvement of the egg happens inside the body of the female. Hence, the posterity of an egg-laying or oviparous creature is in more danger when contrasted with the posterity of a viviparous creature, which brings birth to its young ones.

The quantity of eggs delivered by oviparous species significantly surpasses the quantity of posterity from species that bear live young, however, the odds of endurance are reduced in light of the absence of maternal protection. In viviparity, maintenance, and development of the treated egg inside the maternal body until the youthful creature, as a hatchling or infant, is equipped for autonomous presence. The developing incipient organism gets constant protection from the mother, ordinarily through a placenta or comparative structure. This is the situation in many mammals, numerous reptiles, etc.

Oviparous animals are creatures that lay their eggs, with little or zero embryonic advancement inside the mother. In numerous viviparous species, the mother gives supplements to the embryo during growth, an example known as "matrotrophy."

Hence, the correct answer is option (A).

Additional information:
- In oviparous animals, egg sizes differ tremendously, frequently inside classes, families, and genera. On the other hand, numerous viviparous species have exceptionally little eggs with little supplements put away in the ovulated egg that must be adequate to sustain progeny.
- In the oviparous species, most genes immediately go back to preovulation quality articulation levels after oviposition, while in the viviparous species, numerous genes actually demonstrate noteworthy changes in articulation level between S1 (preovulation) and S6 (after birth).

Note: In oviparous creatures, for example, reptiles and winged animals, prepared eggs are secured by a hard-calcareous shell and are laid in a sheltered spot. After the brooding period, youthful ones move out. In viviparous creatures, for example, the lion's share of vertebrates including people, the zygote forms into a youthful one inside the body of the female person. After a specific development, youthful ones are conveyed by the female person. Because of appropriate consideration and security, the odds of the endurance of young ones are more in viviparous people.