reproductive ADAPTATIONS Notes #38 I can: I dentify the adaptations that some animals use to survive

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insects

LIFE FUNCTIONS OF INSECTS What is an insect? Insects are animals that have a segmented body, a tough exoskeleton, and jointed appendages. They typically have six legs a pair of antennae, and usually have wings! Insects do NOT include spiders.

Sexual or asexual? Insects reproduce sexually REPRODUCTION Sexual or asexual? Insects reproduce sexually

Reproduction Insects grow from an egg into an adult through the process known as metamorphosis.

Reproduction Insects are fertilized internally and develop externally (they hatch from eggs) External development makes the babies more likely to die, so their reproductive advantage is that they lay many, many eggs so the babies have a greater chance of survival http://www.youtube.com/watch?v=yhnlX5nQtRs

Mammals

Examples: Whales, giraffes, hamsters and even humans

What is a mammal? Mammals are animals that have backbones and breast feed their young. They are eukaryotic, and multicellular.

How do mammals feed their young? think How do mammals feed their young? How do mammals reproduce?

Reproduction All mammals reproduce sexually through internal fertilization with internal development

Their reproductive advantages are internal development, which allows the baby to be safe from harm until it’s born. Placenta, or afterbirth, is a fluid that give the baby nutrients and cushions and protects the baby in the womb.

Dolphin Birth Is learning how to swim a learned behavior or an innate behavior? Why? How are dolphins and humans similar with how they reproduce? http://www.youtube.com/watch?v=uWozgwTbIn4 http://www.youtube.com/watch?v=uWozgwTbIn4

Amphibians

What is an aAmphibiansmphibian? Amphibians are animals that live near water. They are vertebrates, which means they have a backbone. Example: frogs

Reproduction Amphibians reproduce sexually using external fertilization (outside the body) Sperm from the males is transported to eggs through the water Like insects, amphibian eggs are totally unprotected, so their reproductive advantage is that they lay many, many eggs so that at least some babies survive

Annelids

Annelid Worms

What are annelid worms? Annelid worms are segmented worms: their bodies are divided into pieces Examples: earthworms, leeches and marine worms Annelid worms are invertebrates: they have no backbone

Reproduction Most annelids reproduce asexually (they divide in half) Some reproduce sexually with external fertilization Their reproductive adaptation is being able to reproduce without a partner

placenta; baby is safe internally many eggs internal external placenta; baby is safe internally internal internal external external many eggs external external without partner

How is sexual reproduction an advantage for terrestrial mammals. A How is sexual reproduction an advantage for terrestrial mammals? A. The eggs are fertilized in water. B. The eggs are fertilized externally on land. C. The eggs are fertilized within the female’s body. D. The eggs are fertilized externally by multiple males.

Which organisms fertilize their offspring internally and develop externally? A. mammals B. insects C. amphibians D. annelids

Which is the only organism that fertilizes it’s offspring externally? A. mammals B. insects C. amphibians D. annelids

Which is the only organism that can sometimes reproduce asexually. A Which is the only organism that can sometimes reproduce asexually? A. mammals B. insects C. amphibians D. annelids