The ion needed to initiate the release of acetylcholine into the synaptic cleft is

What type of specimens where you able to see under each of the microscopes in the microscope activity

Parasitism could be considered a form of which of these types of relationships? -mutualism -commensalism -predator-prey -mimicry

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm