Specimen-and-adaptation defense
Use approved anatomical images/models, a supplied key and physiological records for an observed evidence defense. Before explaining evolutionary adaptations, complete the Unit 01 selection prerequisite. Identify visible structures, calculate a context-aware comparison and distinguish present function from evidence of evolutionary history. No capture, animal handling, manipulation, feeding trial or biological sampling is authorized.
| Criterion | Developing | Proficient | Mastery |
|---|---|---|---|
| Identification & dichotomous key | Names the specimen by guesswork and cannot work a dichotomous key. | Reaches an ID for obvious specimens but stalls on a key, or skips the confirming trait. | Identifies the specimen, working a dichotomous key couplet by couplet where needed, and names the trait that clinched it. |
| Structure–function & adaptation | Explains a trait by need or treats function as proof of origin. | Explains current function but needs help with selection evidence or normalization. | Uses source evidence and a mass/time/context-aware comparison; explains inherited variation and reproductive consequences while recognizing that function alone does not prove adaptation history. |
| Classification & taxonomy placement | Cannot place the specimen beyond “an animal.” | Names a broad group but confuses phyla or classes — calls a spider an insect or a whale a fish. | Places the specimen in its phylum and class — arthropod, chordate, mollusc, mammal — and justifies the placement from its traits. |
| Evidence handling & tool use | Invents features or claims supplied data as a performed lab. | Uses approved images/models or records but omits source or uncertainty. | Maintains source, scale, orientation and context; uses the key and calculation tools correctly, distinguishes supplied from independently observed evidence and follows non-intervention safety limits. |
| Oral defense under questioning | Folds at the first follow-up or recites a memorized label that does not fit the specimen. | Answers some follow-ups, falters when asked to justify a structure or a group. | Handles unrehearsed follow-ups about the specimen in hand with sound, on-the-spot reasoning. |
Integration is reported separately and cannot lower the science grade or block a science demonstration pass. Science and practical criteria determine that pass. Before assessment, publish the target list, task, permitted references, timing, and accommodations. Assess scientific reasoning and safe technique, not confidence or speaking speed.
“The approved image shows the characters used by this key; hidden anatomy remains unknown. The supplied warm bird record is 2 mL O2/(g h), and the cool record is 3, a 50% increase from the warm baseline. That supports a thermal trade-off in this model, not an evolutionary superiority claim or proof of selection history.”
“It’s got feathers, so it’s a bird? I don’t really know what group it’s in beyond that. It just looks like some kind of animal.”
The instructor checks the student's own annotations, calculations and fresh follow-up. Use the unit learning pathway as practice, then change a record or assumption for assessment. Supplied evidence does not certify performed fieldwork; instructor approval is not a claim that an observation happened. Assess reasoning and safe evidence use, not speaking speed or confidence.