| A | B | 
|---|
| Flagellem | a whip-like tail found on protistsand bacteria that assists them in moving | 
| Fission | a kind of asexual reproduction (involving bacteria) in which one bacterium separates into two cells that have the same genetic makeup | 
| Aerobe | an organism that requires oxygen for survival | 
| Anaerobe | an organism that does not require oxygen for survival | 
| Saprophyte | an organism that uses dead material as a resource for energy and food | 
| Nitrogen-fixing bacteria | bacteria that change nitrogen in the air into compounds of nitrogen, which are helpful to animals and plants | 
| Pathogen | an organism that generates disease | 
| Antibiotic | a stubstance produced to destroy or slow down the growth of bacteria | 
| Vaccine | a substance that causes the body to resist infection or develop immunity to a specific virus | 
| Toxin | a poison that is produced by pathogens | 
| Endospore | a bacterial cell that possesses a thick-walled structure around it | 
| Antibiotic resistant | evoulutionary change that occurs in bacteria, when strains of bacteria become unaffected by a specific drug that once worked to kill them | 
| Protist | eukaryotic simple multi-cellular or single-celled organisms that live in wet environments | 
| Algae | protists that contain chlorophyll, and through the process of photosynthesis, are able to make food | 
| Protozoa | animal-like protists that are single-celled, animal like protists | 
| Pseudopod | a cytoplasmic extension, which resembles a foot "fake foot", that is used to capture food | 
| Cilia | short, hair-like structures that stretch from the cell membrane to help timy organisms move | 
| Hyphae | the large amount of multi-celled tubes thta produce a fungus's body | 
| Spore | reproductive cells that form without fertilization in some plants and protists | 
| Sporangia | the circular spore case in zygote fungi | 
| Ascus | a tiny, saclike structure in which spores are created in sac fungi | 
| Budding | a kind of asexual reproduction where a new organism grow out of its parent's side | 
| Basidium | a club shaped structure in which spores are created in club fungi | 
| Lichen | the combination of green algae or cyanobacterium and a fungus that form a mutualistic relationship | 
| Red tide | an algae population explosion that causes salt water to appear red and results in the illness and death of many fish |