Daily and yearly cycles for people and animals are the subject of these biology and nature flash cards
There are 17 flash cards in this set (3 pages to print.)
To use:
1. Print out the cards.
2. Cut along the dashed lines.
3. Fold along the solid lines.
Sample flash cards in this set:
| Questions | Answers |
|---|---|
| Biological clock | an internal timing mechanism |
| Rhythm period | the length of a cycle of activity when under constant environmental conditions |
| Circadian | a rhythm with a period of approximately 24 hours |
| Circatidal | a rhythm with a period of approximately 12.5 hours |
| Circalunar | A rhythm with a period of approximately 29.5 days |
| Circannual | A rhythm with a period of approximately 365 days |
| Daily/Yearly pattern | Behaviors we see daily and yearly that are linked to changes in the environment |
| Free running | describes when the biological clock have no environmental cues |
| Entrainment | the process by which the biological is kept in check with the environment; it is entrained by a zeitgeber |
| Phase shift | when the start of the activity cycle has changed time |
| Zeitgeber | German for "time giver"; this resets a biological clock and keeps the activity entrained to changes in the environment |
| Endogenous | internally controlled |
| Exogenous | externally controlled |
| Phytochrome | a pigment that is involved in flowering |
| Environmental cue | A cue that gives an organism information on the time, resetting the biological clock |
| SDP (short-day plant) | a plant that is initiated to flower when nights are longer than a critical length |
| LDP (long-day plant) | a plant that is initiated to flower when nights are shorter than a critical length |
