BIOLOGY SSS 2 THIRD TERM

WEEK SIX

REPRODUCTIVE SYSTEM INVERTEBRATES 2 (CONTINUATION)

PERFORMANCE OBJECTIVE

Students should be able to;

1. Distinguish between the eggs of vertebrates
2. Compare reproduction in fish, mammal and bird.

CONTENT

 Vertebrate Reproduction

Vertebrates reproduce sexually, and almost all of them have separate male and female sexes. Recall that sexual reproduction is the joining of gametes during fertilization, producing genetically variable offspring. Generally, aquatic species have external fertilization, whereas terrestrial species have internal fertilization.  Vertebrates have one of the following three reproductive strategies: oviparity, ovoviviparous, or vivipary.

• Ovary refers to the development of an embryo within an egg outside the mother’s body. This occurs in most amphibians and reptiles and all birds.
• Ovovivipary refers to the development of an embryo inside an egg within the mother’s body until it hatches. The mother provides no nourishment to the developing.... View More