Chapter 1 Flashcards
(38 cards)
5 characteristics of life
-organization -energy use -maintenance of internal constancy -reproduction, growth, and development -evolution
atom
the smallest chemical unit of a type of pure substance (element) ex: carbon
molecule
a group of joined atoms ex: DNA
organelle
a membrane-bounded structure that has a specific function within a cell ex: chloroplast
cell
fundamental unit of life ex: leaf cell
tissue
a collection of specialized cells that function in a coordinated fashion ex: epidermis of a leaf
organ
a structure consisting of tissues orgranized to interact and carry out specific functions ex: leaf
organ system
organs connected physically or chemically that function together ex: aboveground part of plant
organism
single, living individual
emergent property
-quality that results from interactions of a system’s components -not evident in individual parts -explains relationship between structure and function
producers (autotrophs)
make own food by extracting energy and nutrients from nonliving sources
consumers (heterotrophs)
obtain energy and nutrients by eating other organisms
decomposers (heterotrophs)
obtain energy and nutrients from wastes or dead organisms
taxonomy
the biological science of naming and classifying organisms (species are grouped into same genus)
3 domains
-bacteria (prokaryotes) -archaea (prokaryotes) -eukarya
prokaryote
DNA free in cell; no nucleus
eukaryote
cell has a nucleus
kingdoms
6 total: -animalia -fungi -plantae -protista -bacteria -archaea
Order of classification
-Domain -Kingdom -Phylum -Class -Order -Family -Genus -Species
scientific method
observation question hypothesis prediction experiment conclusion
Reverse
the smallest chemical unit of a type of pure substance (element) ex: carbon
atom
Reverse
a group of joined atoms ex: DNA
molecule
Reverse
a membrane-bounded structure that has a specific function within a cell ex: chloroplast
organelle
Reverse
fundamental unit of life ex: leaf cell
cell