| Answer | Crossword Clue |
|---|---|
| progenitors | PROGENITOR, an ancestor in the direct line |
| progenitor | an ancestor in the direct line |
| degrees | step in a direct line of descent or in the line of ascent to a common ancestor |
| generation | a body of living beings constituting a single step in the line of descent from an ancestor |
| generations | GENERATION, a body of living beings constituting a single step in the line of descent from an ancestor |
| periscope | a device (eg a tube with mirrors) by which an observer can look at something which is not in the direct line of sight |
| periscopes | PERISCOPE, a device (eg a tube with mirrors) by which an observer can look at something which is not in the direct line of sight |
