Levels of Organization
The first level of organization is...
Organism
The system that keeps blood and oxygen flowing throughout the entire body is the...
circulatory system
when one organism makes a copy of itself, like a clone
asexual reproduction
when nature picks the best traits, like animals that are good at hiding
natural selection
this kingdom has all the animals, from tiny bugs to huge whales
Animalia
The last level of organization is...
Organ Cell
the system that allows the body to move is the...
Muscular system
this is how most animals and humans make more of their species
sexual reproduction
when humans choose what traits they like, like picking the fluffiest dog breeds
artificial selection
plants like flowers and trees belong in this big group
Plantae
The third level of organization is...
Organ
the system that breaks down nutrients and food is the...
digestive system
a males sperm and a females eggs combining
fertilization
squirrels with thicker fur surviving a cold winter better is an example of this
natural selection
mushrooms and mold are part of this kingdom of decomposers
fungi
The second level of organization is...
Body System
the system that takes up oxygen from the air we breathe and expels the unwanted carbon dioxide is the...
respiratory system
when a new baby plant grows from a piece of a parent plant
vegetative propagation
farmers breeding cows for milk is a type of this
artificial selection
these are the simplest living thing, like bacteria
Bacteria/Archaea
The fourth level of organization is
Organ Tissue
the system that holds organs in place is the...
skeletal system
some animals can grow back a missing part, and that's a way to make more too
regeneration
Giraffes with longer necks getting more food and having more babies is an example of this
natural selection (on variation)
this kingdom includes things like amoebas and algae, with single cells
Protista