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Life cycle, What is a life cycle, Life cycle of a flowering plant, 3-stage…
Life cycle
What is a life cycle
repeat the stage of growth, development and reproduction
Reproduction process of having youngs
ensure continuity and survival from 1 generation to another generation
look similar to adult
kitten and cat
look different from adult
mosquito and wriggler
importance of reproduction
without reproduction life would come to an end
All animals have different amount of life cycle
all living things have a different length of time
Life cycle of a flowering plant
seed->seedling->adult plant
parts of the life cycle
seed
seed coats protects seed
water,air and warmth is needed for germination
cannot germinate if temperature is to high
does not need sun to survive at this stage until growing its first true leaf
seed leaf provides the seed with food before it can make food
size increases after absorbing water
seedling
will develop leaf and stem in this stage
seed leaf will eventually shrink as the seedling grows
After having true green leaf it can photosynthesis
when there is not enough space or light
The seedlings grow quickly in height to get more sunlight
adult plant
can reproduce when its flowers bear fruit
The fruit changes colour generally
green->orange->red
fruits contain seeds
when it reaches the soil it germinates and repeat the life cycle
parts of adult plant
plant
leaf
fruit
flower
roots
3-stage life cycle
examples
bird
chicken
egg->young->adult
insect
frog
egg->tadpole->adult
mammals
cow
egg->young->adult
human
egg->young->adult
amphibians
cockroach
egg->nymph->adult
grasshopper
egg->nymph->adult
4-stage life cycle
examples
insects
mosquito
egg->larva(wriggler)->pupa->adult
butterfly
egg->larva(caterpillar)->pupa->adult
beetle
egg->larva->pupa->adult