Biology Chapter 1 Flashcards
The scientific study of life
Biology
Building block of all matter
Atom
An association of two or more atoms
Molecule
smallest unit of life (made of molecules)
Cell
Specific cell types organized in a pattern and performing a specific function
Tissue
Tissues that carry out a specific task
Organ
Interacting organs and tissues that fulfill body functions
Organ system
An individual, consists of one or more cells
Organism
Group of individuals of a species in a given area
Population
All populations of all species in a given area
Community
A community interacting with its environment
Ecosystem
All regions of Earth that hold life
Biosphere
Process by which an organism keeps its internal conditions within tolerable ranges by sensing and responding to change
Homeostasis
Capacity to do work
Energy
Substance that is necessary for survival that an organism cannot make itself
Nutrients
Make their own food using energy and simple raw materials from non-biological sources
Producers
Obtain energy by feeding on other organisms
Consumers
Transmission of DNA to offspring
Inheritance
Scope of variation among living organisms
Biodiversity
Sacklike structure containing cells DNA
Nucleus
Single-celled organisms without a nucleus (Bacteria and Archaea)
Prokaryotes