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Name:_____________ Date:_____________ Sexual Reproduction Notes 3 stages of Sexual Reproduction 1. . 2. . 3. . Mating: Process by which Mating Seasons (heat) for Depending on species, mating can occur Some animals mate Fertilization Recall: --> cell division occurs if conditions are met. 1.T 2.N 3.S 4.P (growth of embryo) (prevent drying out) External Fertilization Sperm and egg Common in animals Releasing of gametes in water called Both males and females produce What dangers or difficulties lie in spawing? External Fertilization Why is it common in species that live in water? What do mosses and ferns require in order for external fertilization to occur? Name:_____________ Date:_____________ What advantages does external fertilization have? Disadvantages? Advantages Disadvantages Internal Fertilization Sperm cells are Humans more than Once sperm penetrates egg, membrane changes electrical charge --> Why is this important? Internal Fertilizaton Advantages Disadvantages