Reproduction in Animals 1)Do all animals reproduce similarly? -_________ 2)Why might different animals have different forms of reproduction? -____________________ -_______________________________ -_______________________________________ 3) Are there any advantages/ disadvantages to reproducing at different times of the year? ______________ and ______________

WHEN? Mating occurs when the environmental conditions are good to raise the young.Mating occurs when the environmental conditions are good to raise the young. Among most birds, mating occurs in the _________Among most birds, mating occurs in the _________ –the young are born several weeks later –__________________________________________ Q: Why is this important in cold climates? -______________________________________ ______________________________________

WHEN? Among most mammals, mating occurs in the fallAmong most mammals, mating occurs in the fall –___________________________________ Q: Why is this important in cold climates? - The newborn ___________________________ ______________________________________

Fertilization Fertilization: ______________________Fertilization: ______________________ Reproduction in water animals Fertilization is in animals that live in the water –The female fish will lay eggs in the water. –the male fish will deposit a liquid that contains sperm over the eggs –The sperm swims to and fertilizes the egg –The fertilized egg will divide over and over again; this is the developing embryo (young fish)

Land Animals Q: What problem might land animals encounter during reproduction? _____________________ A: _____________________ Q: What adaptations have evolved in these animals to combat this? A: __________________________ Q: How are the reproductive systems of land animals different than those of water animals? ___________________________________ A: 1) ___________________________________ __________________________________ __________________________________ ___________________________________ ___________________________________ 2) an internal womb is required for the development of the young

What are the different forms of Reproduction? Animals can be: 1)____________: the young hatch from eggs risk?: __________________________________ risk?: __________________________________ ex. _______________________ ex. _______________________ 2) ________________: the female retains the egg until shortly before hatching or the eggs may hatch within the female’s body ex: ________________________ 3) _____________: the young develop in the mother’s body ex: ________________

Mammals Mammals are classified into 3 groups: 1) ____________: egg laying ex: _______________ 2) ___________: their young are born in an immature state and complete their development in their mother’s pouch ex: _____________________ 3) ___________: the young develop in the mother’s body and are nourished by the placenta ex: ___________________