Invitation to Biology Flashcards
The scientific study of life
Biology
Fundamental building block of all matter
Atom
An association of two or more atoms
Molecule
Unique properties of life emerge from the interactions of these components
Cell & Organism
Smallest unit of life
Cell
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
All living things have similar characteristics
Require ongoing inputs of energy and raw materials
Sense and respond to change
Pass DNA to offspring
Organisms Require ____ and _____
Energy and Nutrients
Organisms Require ____ and _____
Energy and Nutrients
The capacity to do work
Energy
Substance that is necessary for survival, but that an organism can’t make for itself
Nutrient
Make own food using energy and simple raw materials from nonbiological sources
Example: photosynthesis in plants
Producers
Obtain energy and nutrients by feeding on other organisms
Example: animals
Consumers
Process by which an organism keeps its internal conditions within a range that favors survival by sensing and responding to change
Homeostasis
Organisms ___, ______, and _______
grow, develop, and reproduce
Increase in size, volume, and number of cells in multicelled species
Growth
Process by which the first cell of a new individual becomes a multicelled adult
Development
Process by which individuals produce offspring
Reproduction
Transmission of DNA to offspring
Inheritance
Carries hereditary information that guides development and other activities
Source of life’s diversity
DNA (deoxyribonucleic acid)
Scope of variation among living organisms
Biodiversity