Life Science Chapter 3 Review

Vocabulary review flashcards covering taxonomy, classification systems, domains of life, and biological organisms based on Life Science Chapter 3 lessons.

Bacteriologist

Scientist who studies bacteria.

Botanist

Scientist who studies plants.

Zoologist

Scientist who studies animals.

Bacterium

A prokaryotic unicellular organism belonging to domain Bacteria.

Prokaryote

A unicellular microorganism that lacks a distinct nucleus.

Lichen

An organism formed by a relationship between a fungus and an algae.

Bacteria Species in Human Body

About 1,000 species of bacteria.

Eukaryote

An organism composed of one or more cells containing a visible nucleus.

Named Plant Species Count

About 300,000 plant species named to date.

Archaean

Prokaryotic unicellular organism belonging to domain Archaea.

Protist

Eukaryotic organism that cannot be classified as fungi, a plant, or an animal.

Helpful Functions of Bacteria

1. Digest food 2. Make vitamins 3. Make foods 4. Decompose dead organisms 5. Recycle nutrients.

Taxonomy

The science of naming and classifying living things.

Carolus Linnaeus

Created the classification system currently used today.

Binomial Nomenclature

A two-word scientific naming system using an organism's genus and species.

Identified Species Count

About 2 million species identified today.

Aristotle

The first to organize living and nonliving things.

Scala Naturae

Scale of Nature, also called the Great chain of Being.

Taxa

Groups into which scientists categorize organisms.

Estimated Earth Species

About 8.7 million species commonly estimated by scientists to live on Earth.

Species

A group of organisms that can mate and produce offspring.

Characteristics of a Living Thing

Made of cells, uses energy, grows and develops, reproduces, and responds to its environment.

Eight Major Categories of Taxonomy

Domain, kingdom, phylum, class, order, family, genus, species.