Biology quiz MCQ on simple animals, animal trivia. This is an interactive online test in which students learn about simple animals and their characteristics. Examples of such animals incluce: hydra, coral, tape worm, planarian, roundworm etc. Simple animals have a not so complex system. Some, like corals are stuck in place and feed on the spot, the tape worn lives as a parasite and relies on already digested food from man. Inthis quiz, students will learn some interesting facts about simple animals. . | Multiple choice quiz featuring biology test questions for students to review biology topics. Click on each question and select the correct answer below and submit. Feedback is instant and at the end you will get your score. Biology quiz for 2nd, 3rd, 4th, 5th, 6th, 7th grades to review. Focus: Online science Trivia | science quiz questions | Biology Test | Biology questions.