What is biology
energy processing:
uses chemical energy stored in food to power its own activities and reactions
bacterica
-all organisms in this domain are prokaryotes -most diverse and widespread prokaryotes ex: e coil, salmonella, staphylococcus
archaea
-all organisms is this domain are prokaryotes -sometimes called extremophiles since most of them live in extreme environment -no known pathogenic archaea ex: halophiles (live in high salt) thermophiles (live in high temps)
eukaryotes
-has a nucleus and other organisms -most are multicellular -multicellular organisms is made up of many cells (humans) -differentiation: cells have certain functions in the organisms
what do biologists do?
-study the diversity of life -research diseases -develop technologies -improve agriculture -preserve the environment
cells
-the basic unit of life and structure of all living things -organisms can either be multicellular or unicellular
eukarya
-these organisms can be unicellular or multicellular -all have a nucleus and other organelles (mitochondria, er, golgi, etc) ex: protists (single celled), animals, plants, and fungus
prokaryotes
-unicellular: the organisms entire body consists of just a single cell -DNA is not contained in a nucleus- everything is in a cell together
biosphere
consist of all parts of the planet ex: earth
populations
group of individual organisms of the same species ex: pride of lions
growth and development:
inherited information (DNA) controls the pattern of growth and development
community
interacting of two or more populations that inhabit a particular area ex: zebras and wildebeests at the water hole
bio:
life
evolutionary adaptation:
living things adapt to their environment over generations
order:
living things are highly organized in sturcture
response to the environment:
living things respond to external stimuli (chemical, light, touch, etc)
homeostasis:
maintaining internal conditions at a tolerable level (temp, pH levels, etc)
tissues
many cells of the same kind working together to perform a certain function ex: muscle cells -> muscle tissue
organisms:
one individual is considered an organism ex: humans, dogs, bacteria, etc
reproduction:
organisms reproduce more of their own kind
ology:
the study of
organ systems
two or more organs working together to perform a specific function ex: digestive, rispatory, reproduction systems
organs
two or more tissues working together to perform a specific function ex: nerve tissue + and smooth muscle tissue work together for your heart
ecosystem
where many different communitites interact and live with eachother ex: desert, forest, mountains
