The increase in insulation that mammals gainwhen they increase their fur or hair density in preparation for winter aids inreducing heat loss through thermal radiation

  1. The increase in insulation that mammals gain when they increase their fur or hair density in preparation for winter aids in reducing heat loss through thermal radiation. Using the physics of heat transfer, EXPLAIN how this works. Piloerection (hair standing up from the skin) increases this layer of insulation highly effectively in terrestrial endotherms, but not aquatic endotherms who instead rely on blubber for insulation. EXPLAIN WHY.
  • Cichlid fish like Tropheusbrichardi are unusual among fish because they are herbivorous. Using the figure below explain why gut length strongly correlates with food quality
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