Individual single celled organisms link up to form a chain.    Lacks a true nucleus.  Cytoplasm contains no organized membrane-bound organelles  Possesses photosynthetic membrane. Lives in freshwater ponds.

Multicellular, marine species of brown algae; commonly called "kelp." Possesses a true (membrane-enclosed) nucleus and are photosynthetic.

Terrestrial "slime molds" that have a true nucleus.  Obtains nutrition by engulfing bacteria and small bits of organic matter.

Individual single celled organisms that lack a true nucleus.  Inhabits hot sulfur springs of Yellowstone (giving the hot springs a colorful appearance).  Obtain energy by oxidizing sulfur.  Optimal conditions for this organism are 60–80 °C and pH 2–4 (thermoacidophiles).

A free-living transparent nematode about 1 mm in length that lives in temperate soil environments. Multicellular and possesses true nucleus.

Individual single celled organisms that lack a true nucleus.  Live in environments that lack oxygen and produce methane as a metabolic byproduct. They are common in wetlands, where they are responsible for marsh gas, and in the digestive tracts of animals such as ruminants and humans, where they are responsible for the methane content of belching in ruminants and flatulence in some humans.[

A rod-shaped (bacillus) single celled pathogen of the gastrointestinal tract of humans.  Lacks a true nucleus.  Cytoplasm contains no organized membrane-bound organelles.  They are chemotrophs, obtaining their energy organic sources.

Multicellular flowering plant.  

Animal