Life Cycles

A. Life Cycle

• A life cycle is a behavior or stage that occurs once in a lifetime. It is repeated generation after generation.

• ALL animals have a life cycle

B. Mammals

• 1. White-tailed Deer

• Fertilized Egg Embryo Fetus Fawn Adult

• 2. Bobcat

• Fertilized Egg Embryo Fetus Kitten Adult

C. Birds

• 1. Pheasant

• Fertilized Egg Embryo Fetus Chick Adult

• Review: What are the first three stages of ANY mammal life cycle?

• Fertilized Egg and Embryo

D. What is a larva?

• A larva is an immature stage that looks different than an adult

Beetle larva

E. Amphibians

• 1. Frog

• Fertilized Egg Larva (tadpole) Adult

• Review: A larva is a(n) …– A. Immature stage that looks like an adult– B. Immature stage that looks different than an adult – C. Just plain childish and immature

• F. What is a pupa? – A dormant or resting

stage to get through winter

• G. What is a Nymph? – A stage that looks

like the adult but has no wings

Monarch Butterfly Pupa

Dragonfly Nymph –caught at Hidden Pond

H. Insects

• 1. Monarch Butterfly

• Fertilized Egg Larva Pupa Adult

• 2. Dragonfly

• Fertilized Egg Nymph Adult

Review

• A toad’s life cycle is similar to a frog. Predict the life cycle of a toad.

• __________ _________ Adult• #1 #2• #1- Fertilized Egg• #2- Larva (tadpole)