Abiotic- non-living factors
in the environment.
what can live in an area.
ie: water, light,
air temperature, wind, soil, rocks
Biotic- living or
once-living (dead) organism in the environment.
ie: plants, animals,
Characteristics of Living things-
1. Made of Cells- membrane covered structure which contains all material necessary for life.
cells (plants & animals)
-can have specialized
sense change (stimulus) and respond.
*stimuli that affect:
chemicals, gravity, degree of light & dark, sound or taste,
*Homeostasis- stable internal environment
3. Have DNA-
molecule (DeoxyriboNucleic Acid)
for making molecules called proteins (cell activity)
of DNA passed on from parent(s).
4. Use Energy-
chemical activities of life.
*metabolism- all chemical
activities that it performs
a) ingestion- living
things must take in food or produce their own.
b) digestion- break
down food to use for energy.
c) respiration- ability
to take in oxygen to breath.
d) excretion- to get
rid of extra food not used (waste)
5. Grows and Develops-
during periods of life
*single cell- grow
in size of cell
*multi cells- grow
in number of cells; also develop and change (stages)
*length of lifespan;
human-76yrs, fly-2 days, bristlecone pine tree-5,500yrs.
6. Reproduce- make similar organisms
a) asexual- single
parent produce identical offspring.
b) sexual- two parents
produce offspring. Offspring will share characteristics of parents.
Necessities of Life:
1. AIR- mixture of
oxygen for respiration
(energy from food)
carbon dioxide for
photosynthesis (converts energy)
2. WATER- involved in chemical reactions
almost all cells are
about 70% water
3. SHELTER- PLACE TO LIVE; space which contains
all that is needed
some organisms compete
4. FOOD- provide ENERGY and raw material to grow
and carry on life processes
own food; use sun for energy
b)Consumers- eat other
down nutrients from dead organisms or animal waste.
Characteristics of Living Things (Organisms)
BIOGENES- theory that states living things come from living
experiment proved this by an experiment of meat and bugs, covering
the containers of meat differently.
SPONTANEOUS GENERATION- theory that states living things come
from non-living things. This theory was proven wrong by above.
Grouping of Living Things:
Organism- living unit.
anything that can live on its own.
of individuals (organisms) of the same species (type) that live together at the same time in the same area (space)
Community- all the
different populations that live and interact in the same area.
Ecosystem- the community
of organisms with the non-living environment.