Biology Chapter 1 Key Terms

smallest and most fundamental unit of matter

colelction of all the ecosystems on earth

smallest fundamental unit of structure and function in living things

set of populations inhabiting a particular area

all the living things in a particular area toether with the abiotic, nonliving parts of that environment

organism with cells that have nuclei and membrane-bound organelles

ability of an organism to maintain constant internal conditions

large molecule, typically formed by the joining of smaller molecules

chemical structure consisting of at least two atoms held together by one or more chemical bonds

collection of related tissues grouped together performing a common function

level of organization that consists of functionally related interacting organs

small structures that exist within cells and carry out cellular functions

individual living entity

all of the individuals of a species living within a specific area

single-celled organism that lacks organelles and does not have nuclei surrounded by a nuclear membrane

group of similar cells carrying out related functions