Question

Offsprings of oviparous animals are at greater risk of survival compared to those of viviparous animals because

• A. Embryo does not develop completely
• B. Proper embryonic care and protection is absent
• C. Genetic variations do not occur
• D. Progenies are of smaller size

Answer 1

The correct option is B

Proper embryonic care and protection is absent

The correct option is B:

Explanation of the correct option:

1. Due to the lack of embryonic care and protection, oviparous animals' offspring have a lower chance of surviving.
2. The fertilized egg is laid in a secure location and is only shielded by a strong calcareous shell.
3. Viviparous animals produce offspring, which develop inside the womb and receive sufficient nutrition and shelter.

Explanation of the incorrect options:

Option A:

1. Oviparous animals are those that reproduce by laying eggs.
2. Oviparous animals are those that lay eggs.
3. In oviparous species, internal fertilization occurs, but external embryo development occurs.
4. In the eggs of birds like chickens and ducks, there are embryos that are still developing.
5. Eggs are shielded from harm by their robust shells.

Option C:

Fertilization occurs internally in oviparous species, but embryo development occurs outside.

Option D:

1. Female animals that lay their eggs with little or no extra embryonic development within the mother are called oviparous.
2. Progeny is slang for "children" or "offspring."
3. Live birth occurs in ovoviviparous animals.

Final answer: Offspring of oviparous animals are at greater risk of survival compared to those of viviparous animals because proper embryonic care and protection are absent.