“REPRODUCTION IN ANIMALS” Mrs. Sandy Gomez

REPRODUCTION  Requires only one parent (Adnavtage)  Takes place faster  Less genetic diversity (Disadvantage)  2 types of reproduction:  Asexual  Sexual Sexual Reproduction Asexual Reproduction

ASEXUAL REPRODUCTION  Requires only one parent (Adnavtage)  Takes place faster  Less genetic diversity (Disadvantage)

ASEXUAL REPRODUCTION  Common in: Cnidarians Some lizardsBacteria Plants Fungi

REPRODUCTION  Requires only one parent (Adnavtage)  Takes place faster  Less genetic diversity (Disadvantage)  2 types of reproduction:  Asexual  Sexual Sexual Reproduction Asexual Reproduction

ASEXUAL REPRODUCTION  Types of asexual reproduction: Binary Fission BuddingVegetative Propagation Sporulation Fragmentation Parthenogenesis

SEXUAL REPRODUCTION  Requires two gametes from different parents:(Disdvantage)  Egg cell (female)  Sperm cell (male)  Takes place longer  Maintains genetic diversity (Advantage)

TYPES OF FERTILIZATION

 2 types: Internal Fertilization External Fertilization Eggs are fertilized inside the body of the egg- producing individual Eggs are fertilized outside the body of the egg- producing individual Some invertebrates: 1.Sponges, spiders Vertebrates: 1.Some fish and amphibians 2.All reptiles, birds and mammals Some invertebrates: 1.Sponges, spiders Vertebrates: 1.Some fish and amphibians 2.All reptiles, birds and mammals Some invertebrates: 1.Corals, worms, mollusks Vertebrates: 1.Some fish and amphibians Some invertebrates: 1.Corals, worms, mollusks Vertebrates: 1.Some fish and amphibians

DEVELOPMENT AND GROWTH

 After fertilization takes place, where do embryos develop? Developing Embryos Ovoviparous: -Outside parent´s body -Nutrients obtained from egg yolk Viviparous: - Inside parent´s body -Obtains nutrients from mother´s body Ovoviviparous: -Inside parent´s body -Nutrients obtained from egg yolk

DEVELOPMENT AND GROWTH  Oviparous  Viviparous Most invertebates, reptiles Some fish and amphibians All birds Few mammals Most mammals Some: insects, sharks, amphibians, reptiles

DEVELOPMENT AND GROWTH  Ovoviviparous Some: 1.Fish 2.Shark 3.Reptiles