Osmoregulators and excretion - model answers

IB Biology: Osmoregulators and excretion - model answers

This diagram represents a cladogram showing one possible evolution of osmoregulation and nitrogenous waste excretion.a) Identify the three groups of animals which have the greatest ability to conserve water.Sea / desert mammals, birds and insectsb) Which nitrogen containing product, urea, uric acid or ammonia, is the most toxic?Ammonia is most toxicc) Explain why it is an advantage for an animal who wishes to conserve...


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