These are bacteria These are bacteria that transform energy that transform energy

from sunlight into from sunlight into energy that can be energy that can be

used by cellsused by cells

Producers

These are the cells These are the cells that viruses infect in that viruses infect in

order to make order to make copiescopies

HostHost cells cells

These organisms These organisms drift in water instead drift in water instead

of swimming of swimming through it.through it.

planktonplankton

These get energy by These get energy by breaking down the breaking down the chemicals in dead or chemicals in dead or decaying organisms decaying organisms and recycling them.and recycling them.

These are animal-like These are animal-like protist that get their protist that get their energy. By eating other energy. By eating other organisms, or decaying organisms, or decaying parts of other organisms.parts of other organisms.

ProtozoaProtozoa

These organisms are These organisms are able to live in harsh, able to live in harsh, extreme extreme environments.environments.

ArchaeaArchaea

This name applies to both This name applies to both multi-cellular protist and multi-cellular protist and single-celled protist that single-celled protist that contain chlorophyll and contain chlorophyll and use sunlight as an energy use sunlight as an energy source.source.

AlgaeAlgae

These live in very These live in very close relationships close relationships either inside or on the either inside or on the surface of other surface of other organisms.organisms.

ParasitesParasites

These can only be These can only be seen with the aid of seen with the aid of a microscope.a microscope.

MicroorganismsMicroorganisms

Single-celled Single-celled organisms organisms reproduce by this reproduce by this process.process.

Binary Binary fissionfission

This is a small This is a small collection of genetic collection of genetic material enclosed material enclosed in a protein shell.in a protein shell.

VirusVirus

These life forms These life forms are the simplest are the simplest

kind of life known kind of life known on Earthon Earth

BacteriBacteriaa

Scientists divide the Scientists divide the organisms they organisms they

identify into these identify into these groups.groups.

KingdomsKingdoms

Single-celled organisms Single-celled organisms that live in deep sea that live in deep sea vents or beneath ice vents or beneath ice belong to this group.belong to this group.

ArchaeaArchaea

Some of these Some of these organisms harm their organisms harm their hosts while others are hosts while others are helpful to their hosts or helpful to their hosts or

do not affect them.do not affect them.

ParasitesParasites

These protists are These protists are producers and producers and

contain chlorophyllcontain chlorophyll

AlgaeAlgae

These bacteria These bacteria break down dead break down dead matter for use by matter for use by other organisms.other organisms.

DecomposersDecomposers

These bacteria are a These bacteria are a food source for food source for organisms that cannot organisms that cannot make their own food.make their own food.

ProducerProducerss

Examples of this Examples of this are the are the paramecium and paramecium and the amoeba.the amoeba.

ProtozoaProtozoa

In this material from In this material from one cell is broken one cell is broken apart into two apart into two cells.cells.

Binary FissionBinary Fission

Some of these Some of these are made of are made of just one cell.just one cell.

MicrooganismsMicrooganisms

Some viruses use Some viruses use these as a factory these as a factory that produces new that produces new

viruses.viruses.

Host cellsHost cells