Biology Ch 1 Southeastern

what do all organisms have in common

they all consist of one or more cells, they are complex, and they all respond to stimuli

homeostasis

organisms retain relatively stable internal conditions ex: temp

what are the cellular levels from first to last

atoms, molecules, macromolecules, organelles, cells, organisms

atoms

fundamental elements of matter, units of matter, smallest unit

molecules

clusters of atoms

macromolecules

large biological moleules

organelles

specialized parts of the cell (serve certain function)

cells

membrane bound unit of life (think of the blue ball Juliet)

cell theory

cell is the basic unit of life

what are the organism levels first to last

tissues, organs, organ system, organisms

tissues

a group of cells that act as a unit (rebuildable)

organs

a group of tissues that act as a functional structural unit (established)

organ system

a group of organs that function together

organisms

multicellular living things ex: animal

hierarchical organization first to last

population, community, ecosystem, biosphere

population

a group of the same species in one area

community

all species inhabiting and interacting (living)

ecosystem

interacting system of all organisms (includes abiotic factors ex: dirt)

biosphere

earth is an ecosystem that we call a biosphere

what are the factors of hierarchical organization

• each level has emergent properties

• interaction of components

• have to look at the whole

• life is an emergent property

emergent property 

caused by something else ex: evolution

what is a scientific theory

a bunch of theories made into one, there are lots of repeated experiments

Natural Selection

the organisms without the traits fit to survive will die

what does structure determine

function ex: arms structure are recognizable so you can guess its function

what does all life require

constant energy 

what form is most energy introduced through

solar energy

if energy is not introduced through solar energy where is it introduced

chemical energy (food) is transferred into other forms of energy

what must happen to DNA for life to go on

the DNA must be copied correctly

what is the path of gene expression

DNA-RNA-Protien

what does control of the gene expression lead to

different cells/ tissue types

what are all organisms descended from

simple creatures

all living things have

DNA

what does conservation of a trait symbolize

a role fundamental to survival