Which structure might a fish use to it detect the movement of nearby predators

Which is the correct order in the scientific process? ask a question ® form a hypothesis ® make an observation ask a question ® make an observation ® form a hypothesis make an observation ® form a hypothesis ® ask a question make an observation ® ask a question ® form a hypothesis

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

Pulmonary arteries carry highly oxygenated blood. true or false?