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Repair DNA

Developing tricks and tools to keep their enzymes in order is one way thermophiles survive. They also use techniques to keep their DNA from falling apart under intense heat. Like proteins, the parts of the long, spiral ladder-shaped DNA molecule start to unravel and break apart under high hea... Read More

Types of Microbes

Microbes can be divided into six main types: Archaea, Read More

Virus or Bacterium?

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Deadly infection virtually unheard of

It's an infection so severe it can kill and doctors say it's on the rise. So why haven't most of us ever heard of it? Diane Henry takes care of other people. But for weeks last year, she could barely do anything. "Started experiencing severe stomach pain, but ignored it," said Henry. Read More

About RSS

rssRSS stands for really simple syndication. It's an acronym encompassing various data formats (xml, atom, rss, rdf) used for providing users with frequently updated content. RSS also allows... Read More

Green Algae

The most clearly plant-like algae, this species gets its namesake hue from high levels of chlorophyll.


Their cell walls are made up of cellulose, the same material that makes up the cell walls in larger, multicellular plants. Like plants, they store the food they make through photosyn... Read More

Dinoflagellates

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Algae


Algae also play an important role as the foundation for the aquatic food chain. All higher aquatic life forms depend either directly or indirectly on microscopic gardens of algae.

Most unicellular algae live in water, some dwell in moist soil, and others join ... Read More

Protista of Note





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How They Move


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Protista

Algae, Protozoa, Slime Molds, and Water Molds


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Diatoms

Protozoa

The name protozoa means “first animals.” As the principal hunters and grazers of the microbial world, protozoa play a key role in maintaining the balance of bacterial, algal, and other microbial life. They also are themselves an important food source for larger creatures and the basis of many fo... Read More

Hunters and Grazers

Most fungi can best be described as grazers, but a few are active hunters.

Hunter fungi prey on tiny protozoa and worm-like creatures called nematodes.

Some produce a sticky substance on their hyphae, which then act like flypaper, trapping passing prey.

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Single-minded Mission

Viruses exist for one purpose only: to reproduce. To do that, they have to take over the reproductive machinery of suitable host cells.


Upon landing on an appropriate host cell, a virus gets its genetic material inside the cell either by tricking the host cell to pull it inside, like ... Read More

Contact

When viruses come into contact with host cells, they trigger the cells to engulf them, or fuse themselves to the cell membrane so they can release their DNA into the cell.

Once inside a host cell, viruses take over its machinery to reproduce. Viruses override the host cell’s normal functioni... Read More

What They Are

A virus is basically a tiny bundle of genetic material—either DNA or RNA—carried in a shell called the viral coat, or capsid, which is made up of bits of protein called capsomeres. Some viruses have an additional layer around this coat called an envelope. That's basically all there is to viru... Read More

Slime Molds




In 1973, a Dallas resident went out to the backyard only to stumble upon a reddish, jelly-like mass pulsating in the grass. News reports on the discover... Read More

Water Molds


Water molds are always found in wet environments, especially in fresh water sources and near the upper layers of moist soil.

Officially named Oomycota, they are also known as downy mildews and white rusts.

Water molds were long considered ... Read More

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