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These golden brown algae, that include plankton, are important for water food chains and the production of atmospheric oxygen gas.

These filaments are located between the cell wall and cell membrane of Gram-negative spirochetes and are used for motility.

This algae makes a neurotoxin that affect fish and humans.  These toxins form bloody lesions and neurological problems.

What is unique about the bacteria in the cow’s rumen?

Yeasts are members of this domain.

____________________________ are fungal asexual spores that are made in a sac.

These fungal vegetative forms have slender filaments of cytoplasm and nuclei.

These intracellular organisms are not transmitted via arthropod vectors and cause severe eye infections and infections in birds (parrot fever).

Green and purple sulfur bacteria live in anaerobic conditions and produce this photosynthetic pigment.

Most bacteria have defined morphologies. One type of morphology is pictured here.