Vertebrate Reproduction Life Sciences Grade 12 Questions and Answers. Vertebrate reproduction requires a myriad of precisely orchestrated events—in particular, the maternal production of oocytes, the paternal production of sperm, successful fertilization, and initiation of early embryonic cell divisions. These processes are governed by a host of signaling pathways.
REPRODUCTION IN VERTEBRATES – LIFE SCIENCES QUESTIONS AND ANSWERS
Activity 1
Questions
Indicate whether each of the statements in COLUMN I applies to A ONLY, B ONLY, BOTH A and B or NONE of the items in COLUMN II. Write A only, B only, both A and B, or none next to the question number (1 to 5).
| COLUMN I | COLUMN II |
| 1. Oviparous | A Eggs are produced B Eggs are always incubated by the female |
| 2. Ovoviviparous | A Eggs incubated in nests B Eggs incubated in the female’s body |
| 3. Precocial | A Small, helpless offspring born B Intense parental care required |
| 4. Viviparous | A Gestation period required B Live offspring born |
| 5. Altricial | A Intense parental care required B Offspring can look after themselves |
(5 × 2 ) [10]
Answers to activity 1
- A only (B is wrong, because some animals, like insects, simply lay their eggs and do not incubate them. In some birds both the male and female incubate the eggs)
- B only (A is wrong, because the eggs are not released from the female’s body)
- None (Precocial animals are born quite well-developed, they can live independently from their parents and find their own food, so parental care is not required)
- Both A and B
- A only (B is wrong, because altricial animals are born small and helpless. They cannot look after themselves or find their own food. Their parents must look after them, protect them and feed them.) (5 × 2) [10)