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