| Measure | Value |
|---|
Simplified teaching model. Stages are drawn in the same style for every animal; times are rounded and depend on temperature for sea urchins and frogs. Cell numbers are exact only during synchronous cleavage (2ⁿ); later counts are rough. Experiment outcomes follow the classic results (Driesch, Spemann and Mangold, limb-bud grafts), drawn simply.
| Measure | Value |
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Hormone levels are in relative units (each hormone scaled to its own range), shaped like typical textbook curves. Ovulation is placed 14 days before the end of the cycle. The pill scenario shows a 21-day active and 7-day placebo pack; dotted lines are the synthetic hormones.
Problems are generated at random. For "predict then watch" items, pick your prediction first; the picture then plays the real outcome. The worked solution builds step by step, ending with a common mistake to avoid.
Your job
Fictional people. Data values are rounded from published studies and national reports for teaching. Not medical advice.
Wrong picks are fine here. Each one tells you why.