| A | B |
| The first genetic material was likely | RNA |
| The earliest autotrophs | Cyanobacteria |
| Which kingdom has been replaced with two domains? | Monera |
| Members of this kingdom have cell walls and are all heterotrophic | Fungi |
| Which eukaryotic kingdom is paraphyletic and is considered obsolete | Protista |
| The first porkaryotic cells appeared during this era | Precambrian |
| If penicillin inhibits the synthesis of peptodoglycan, which bacteria are most afftected? | Gram-positive |
| Slimy material that enables bacteria to resist the immune system | Capsule |
| Structure that permits conjugation | Sex pilus |
| Structure in bacteria that enables it to resist harsh conditions | Endospore |
| Uses light energy to synthesize organic compoints from CO2 | Photoautotrophs |
| Obtains energy by oxidizing inorganic substances; energy that is used to fix CO2 | Chemoautotrophs |
| Uses light energy to generate ATP but do not release oxygen | Photoheterotrophs |
| Marine organisms that produce potent neurotoxins causing red tides | Dinoflagellates |
| Unicellular eukaryotes that has a siliceous shell | Diatom |
| A multicellular marine algae that lives at depth reached only by blue light | Red algae |
| Ancestral to the plant kingdom | Green algae |
| Group that consists of parasitic flagellated cells, such as Trypanosoma | Euglenozoans |
| Have membrane-bound sacs under their plasma membranes | Alveolata |
| What do all fungi have in common? | Absorption of nutrients |
| Found in the cell walls of fungi | Chitin |
| Phylum that contains mushrooms, shelf fungi, and puffballs | Basidiomycota |
| Symbiotic relationship between fungi and plant roots | Mycorrhizae |
| The age of the Earth | 4.5 billion years old |
| The gas NOT present in the Earth's early atmosphere | Oxygen |
| How many mass extinctions have occurred | 6 |
| A paramecium is a | Ciliate |
| The fusion of cytoplasm | Plasmogamy |
| The fusion of nuclei | karyogamy |
| Protists that move and feed by extending their cytoplasm into pseudopodia. | Amoebas |
| The protists that are most closely related to animals | Choanoflagellates |
| Causes late blight, a disease of potato plants. | Plasmodial slime molds |