| Measure | Value |
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A teaching model with rounded values. Endotherms follow a thermoneutral zone model: below the lower critical temperature, heat production rises in proportion to the gap between body and outside temperature, up to about 5 times basal (less when oxygen is low); above the upper critical temperature they cool by evaporation, which needs water. Basal rates follow 3.4 × M0.75 watts (M in kg), scaled for each animal. Ectotherms match the outside temperature and their standard rate rises with Q10 = 2.5. Fish oxygen supply depends on oxygen level and on how much oxygen water can hold, which falls as water warms. Water flows are in percent of body mass per day; animals excrete any surplus, so only shortfalls show as losses. Real animals also use behaviour (burrows, shade, migration) that the bench leaves out. Animation speed is exaggerated.
Problems are randomly generated with realistic teaching values. For prediction items, predict first, then watch the worked solution build. Units that cancel are struck through in red.
Your job
Drag a card onto a box, or tap a card and then tap the box's name. Cards are buttons, so Tab and Enter work too.
Fictional people and teaching data with rounded values, except where a classic study is named. Not medical advice.
Wrong picks are fine here. Each one tells you why.