General Biology and Biological Classification Flashcards

Vocabulary flashcards covering biological classification, domains of life, nature of science, levels of biological organization, and homeostasis.

Biology

The Science of Life.

The 3 Domains

The three major classification groups for all living organisms: Bacteria, Archaea, and Eukarya.

Unicellular

Made of one cell.

Multicellular

Made of many cells.

Prokaryotic

Cells that do not have a nucleus.

Eukaryotic

Cells that have a nucleus.

Ingested

A method of obtaining food by eating or consuming food.

Made

A method of obtaining food where organisms make their own food, usually through Photosynthesis.

Absorbed

A method of obtaining food by taking in nutrients from surroundings.

Bacteria

A domain of living things characterized as relatively small, unicellular, prokaryotic, and absorbing food.

Archaea

A domain of living things characterized as relatively small, unicellular, prokaryotic, and absorbing food.

Eukarya

A domain of living things characterized as relatively large, variable in cell number, eukaryotic, and variable in how food is obtained.

Evolutionary theory

The theory that explains both the similarities and the diversity between living organisms.

Scientific method

A set of principles and guidelines that govern how science should theoretically be done.

Cell

The smallest functioning unit to be considered alive or to be considered an organism.

Homeostasis

The maintenance of constant internal conditions despite external fluctuations.

Hormones

Chemical messengers through which organisms maintain homeostasis.

Biological Organization

The levels of organization in living things from most specific: Atoms -> Molecules -> Organelles -> Cells -> Tissues -> Organs -> Organism -> Population -> Community -> Ecosystem -> Biosphere.