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12 Cards in this Set

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STAGES OF LIFE: vertebrates
Youth
Maturity
Old age
Y - grow quickly, learn many things (find food, escape)
M - longest stage of life.
OA - Is hard for them to survive.
STAGES OF LIFE: Invertebrates
Larvae
Pupa
L - Longest stage of life (sometimes years like the beetle).
P - once the larvae has become a cocoon.
STAGES OF LIFE: DIFFERENCES between vertebrates and invertebrates
1. ins don't have bones
2. ins don't have hair
3. vs viviparous (born from mother's womb)
4. ins born from eggs outsode mother's body
MAMMAL REPRODUCTION:
Finding a mate (encontrar pareja)
1. Reproduce at certain times
2. Males and females on heat
females - special smell
males - attract with behaviour (caress, make sounds, fight other males)
MAMMAL REPRODUCTION: MAMMAL PREGNANCY AND BIRTH
1. viviparous
2. Young develop in womb during PREGNANCY
3. Length of pregnancy depends on the mammal species.
MAMMAL REPRODUCTION: LOOKING AFTER THE YOUNG
1. Newborns depend on mother
2. Mother feeds them (alimenta)
3. Mother protects them
4. Mothers teach them how to hunt, protect themselves, find food, etc.
BIRD REPRODUCTION: Finding a mate
1. On heat in spring (en celo)
2. Males attract females
3. Sing, dance or show off their feathers
4. Females choose the healthiest and strongest males
BIRD REPRODUCTION: BUILDING A NEST AND LAYING EGGS
1. Birds - oviparious = they are born from eggs, not in mother's womb
2. Females usually lay between 1-20 eggs at a time
3. Birds (both mom and dad) incubate eggs in a nest for 10-28 days
4. Chicks hatch (nacen) by breaing egg shell with their beaks
BIRD REPRODUCTION: LOOKING AFTER THE CHICKS
1. At first parents feed young chicks
2. When they are bigger they look for their own food
3. As they grow, parents teach them to fly
4. They begin a life of teir own (se independizan)
AMPHIIBIAN REPRODUCTION:(oviparous)
finding a mate
Males attract females
by croaking, changing colour, dancing or caressing
AMPHIIBIAN REPRODUCTION:
Laying eggs
1. In rivers or ponds
2. Eggs are small and don't have a shell
3. They don't need incubation period
4. Amphibians abandon their eggs
5. They come out of the egg 1 week later
AMPHIIBIAN REPRODUCTION: development of a frog
1. First stage - have a long tail and they breathe with outer gills
2. Later, they have inner gills 2 hind legs and eat other animals
3. Now have 4 legs, gills disappeared look like small frogs
4. When developed go on land -- but live near water