7th Grade Science Extensions

Single Celled Organisms

Below you will find a number of single celled organisms that have unique characteristics that help them survive as well as some that have characteristics of both Plants and Animals. Choose one and describe how it's shape and important organelles help it survive and carry out it's life functions.

Single Celled Organisms

Bacteria

General Background information on Bacteria

Different Types of BacteriaBacterial classification is more complex than the one based on basic factors like whether they are harmful or helpful to humans or the environment in which they exist. This Buzzle article will give you the detailed classification of bacteria.

The Good, Bad and Ugly Bacteria

Just How Can Bacteria Be 'Healthy' For Your Body?The human body is filled with "bad bacteria" AND "good bacteria", and maintaining a proper balance is an essential part of our overall health. You've probably heard "good bacteria" called probiotics - a word that gets thrown around a lot in health food stores and fitness circles.

Archaea

General Background Information on Archaea

More Background Information

Archaea In the Ocean Thermal Vents

Archaea in the Human Body

Salt Loving Archaea

The Microbes That Keep Hydrothermal Vents PumpingThese tubeworm colonies grow where hot, mineral-laden water flows out of the seafloor in undersea hot springs. Credit: ©2003 MBARI By Lyndsy Gazda...

Role of archaea in human disease

Salt-loving Archaebacteria - Halobacteria - Overview - Encyclopedia of Life

Adaptation to High-Salt Environments ExplainedLife on earth exhibits an enormous adaptive capacity and living organisms can be found even in extreme environments. The halophilic archea are a group of microorganisms that grow best in highly sal…

Single Celled Fungi

General Background on Single Celled Fungi

Biology of Yeast

yeast | Definition & UsesYeast: Yeast, any of about 1,500 species of single-celled fungi, several of which are of economic importance or are pathogenic.

You And Yeast Have More In Common Than You Might ThinkGenetically, at least, not that much has changed in the billion years since you two last shared a relative. Roughly half the 500 genes yeast need for life are interchangeable with the human versions.

Protista: Protozoa and Algae

General Background on Protozoa

Classification of Protozoans

General Background on Algae

What are Dinoflagellates

Dinoflagellates: Characteristics of Both Plants and Animals

Background on Amoebas

Diatoms: A Type of Algae

Life History and Ecology of Diatoms

Brain-Eating Amoeba (Naegleria Fowleri): Causes and SymptomsWebMD explains what a brain-eating amoeba is, how it enters the body, how to prevent an infection with brain-eating amoeba, and more.

What Is a Paramecium?Paramecia are single-celled protists that are naturally found in aquatic habitats.

Dinoflagellates and Red TidesDinoflagellates are the most common sources of bioluminescence at the surface of the ocean. This section describes the life history and ecology of dinoflagellates, and explains how and why they pro…

diatom | Description, Characteristics, & ReproductionDiatom: Diatom, any of about 16,000 species of unicellular algae in the class Bacillariophyceae.

What's So Unique About Euglena Cells?Euglena are tiny protists with characteristics of both plant and animal cells. Some species are capable of photosynthesis and others feed on bacteria.

Amoeba | protozoan orderAmoeba: Amoeba, any of the microscopic unicellular protozoans of the rhizopodan order Amoebida. The well-known type species, Amoeba proteus, is found on decaying bottom vegetation of

Paramecium | protozoan genusParamecium: Paramecium, genus of microscopic, single-celled, and free-living protozoans. Most species can be cultivated easily in the laboratory, making them ideal model organisms, well

Euglena | Definition, Classification, & FactsEuglena: Euglena, genus of more than 1,000 species of single-celled flagellated microorganisms that feature both plant and animal characteristics.

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