A reading worksheet for the turtlegrass research. A completed earlier step does not establish every later one. Print or save and add notes from a source.
On a small screen, scroll the table sideways to see every column. You can also focus the table and use the arrow keys.
| Step | Evidence to look for | How could water also contribute? |
|---|---|---|
| Visit | Animal reaches a male flower. | |
| Pickup | Pollen adheres to its body. | |
| Delivery | Pollen reaches a receptive stigma after transport. | |
| Pollen growth | Germination and tube formation are observed. |
Control question: If an enclosure excludes animals but also changes flow, which two explanations could account for a change in pollen delivery?
Scope question: Does the evidence show that animals can contribute, or does it estimate their share of all pollination in a natural meadow?
Further stages such as fertilization and seed production require their own evidence. Do not extend a pollen-tube result to a measured seed yield unless the study did so.