Download Classification Guided Notes

Name __________________________________ Date______
Classifying Life
Why do biologists classify organisms?
Biologists use classification to ______________________________ living things into groups so
that they organisms are easier to study.
What are the levels of classification?
A ______________________ is the largest level of organization. Within a domain there are
________________________. Within kingdoms, there are ________________. Within phyla are
__________________. Within classes are ____________________. Within orders are
____________________. Each family contains one or more __________________. Finally, each
genus contains one or more ____________________.
How are taxonomic keys useful?
Taxonomic keys are useful ______________ that help determine the __________________ of
organisms.
Domains & Kingdoms
How are organisms classified into domains and kingdoms?
Organisms are placed into domains and kingdoms based on:
1. ___________________________________________________________________
2. ___________________________________________________________________
3. ___________________________________________________________________
3 Domains of Life
o Domain Archea (bacteria)

Been on Earth for ________ billion years

Thrive in harsh environments such as: ____________________ and
hydrothermal vents

________________ – using chemosynthesis

________________

Differ ________________________________ from Eubacteria and in & cell
structure.
o Domain Bacteria (bacteria)

_________________________ which include most bacteria

Found nearly ________________________
o Domain Eukarya (all other living things)

________________ in this domain have eukaryotic cells.

Eukaryotes are organisms with cells that contain _________________

There are __________ kingdoms within this domain
Kingdom Protista

Single celled or _______________ multicellular organisms

Eukaryotic cells

Evolved 2 _______________ years ago and are made up of all eukaryotes
that are not plants, animals or fungi.

Can be _______________-like, plant-like or fungus-like in their
characteristics
Kingdom Plantae

Usually green and can utilize the process of ____________________making
them autotrophic

Complex, ________________ organisms
Kingdom Fungi

Originally classified as ___________, but do not do photosynthesis so
eventually were placed in their own kingdom

Includes ___________ and mushrooms

Can be unicellular or multicellular

____________________
Kingdom Animalia

Complex, multicellular organisms

Most can _____________ and have nervous systems that help them sense
and react to their surroundings

Cells _____________ cell walls unlike plants, fungi, bacteria, and most
protists

Heterotrophs