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Functions of muscles found in the alimentary canal are;Movement of food/peristalsisMixing of food
Role of the placenta in placental mammals include;It is the site for exchange of materials between the foetus and mother.It is a mechanical barrier protecting the foetus against maternal blood pressure which could destroy delicate foetal capillaries.It secrets hormones oestrogen and progesteroneFrom the foetus to mother, substances that pass are carbon (iv) oxide and nitrogenous waste
Functions of seal in an engine include;Prevent oil or grease leaking from where it is neededPrevent entry of dirt, duct or grit into the sealed areaImproves engine breathing
Functions of worker bees in a bee colony are;Feed the queen, drones and broodProtect the hives from intrudersCollect nector pollen, tree resinsBuild combsclean the hiveMake honey and bee waxKill drones after mating the queen
Functions of entrepreneur in production are;Identifies viable business opportunityCombined the other factors of productionprovides capital required to carry out productionEmploy and reward other factors of productionHe bears all the risks and lossesHe makes all the decision on the businessHe controls and manages the business