| 2026-08-23 | Organism that moves using pseudopodia |
| 2025-08-20 | Shape-shifting organism |
| 2024-12-23 | Single-celled organism |
| 2023-10-04 | Much-studied micro-organism |
| 2023-08-01 | One-celled creature |
| 2023-06-28 | Cell with pseudopods |
| 2023-03-19 | It divides and multiplies |
| 2022-12-17 | One confined to a cell? |
| 2022-02-23 | Simple creature |
| 2022-02-08 | Tiny shape-shifter |
| 2021-11-24 | Tiny creature on a slide |
| 2021-10-26 | Microscopic life form |
| 2021-10-17 | Little blob |
| 2021-08-24 | Single-celled creature |
| 2020-11-04 | Tiny organism |
| 2020-09-24 | Blob on a slide |
| 2018-10-23 | Slide presentation? |
| 2018-08-08 | Blob on a slide |
| 2018-06-10 | Simple life? |
| 2016-06-17 | One multiplying by division |
| 2016-03-16 | Certain protozoan |
| 2016-01-03 | One having a simple existence |
| 2015-08-04 | Blob that divides |
| 2014-08-26 | Thing seen on a lab slide |
| 2013-02-27 | Simple creature |
| 2012-06-04 | Microscopic blob |
| 2012-04-22 | Wee creature |
| 2012-02-05 | Tiny blob |
| 2010-11-07 | Slide sight |
| 2010-09-22 | It multiplies by dividing |
| 2010-07-07 | Cell on a slide |
| 2009-09-08 | Pseudopod-forming organism |
| 2008-07-03 | Tiny blob |
| 2008-05-11 | Slide presentation? |
| 2007-09-02 | Study in multiplication and division? |
| 2007-07-07 | Simple life? |
| 2007-02-16 | Blob |
| 2006-11-23 | One that lives in a single cell? |
| 2006-08-09 | It divides to multiply |
| 2005-12-20 | One-celled creature |
| 2005-12-13 | Protozoan |
| 2005-08-30 | Protozoan |
| 2005-06-27 | Single-celled creature |
| 2005-01-19 | Organism with pseudopods |
| 2005-01-09 | Elementary biology subject |
| 2004-09-13 | Itsy-bitsy creature |
| 2004-08-16 | Microscopic organism |
| 2002-07-29 | One-celled protozoan |
| 2001-02-26 | One-celled being |
| 2001-01-25 | It forms food vacuoles |
| 2000-12-28 | It multiplies by dividing |
| 2000-10-03 | Microscopic critter |
| 2000-07-29 | Item on a lab slide |
| 1999-12-19 | Protozoan |
| 1999-07-27 | Microscopic critter |
| 1998-11-24 | Microscopic creature |
| 1998-08-21 | Slide presentation? |
| 1997-04-13 | Protozoan |
| 1996-11-17 | Protozoan |
| 1996-01-07 | Slide sight |
| 1996-01-03 | One-celled organism |
| 1995-10-15 | Simple creature |
| 1994-05-12 | Microscopy subject |