10 Questions
Which of the following best describes the tissue-organ grade of organization?
An aggregation of tissues that form organs with more specialized functions
What is a characteristic feature of flatworms in terms of organizational complexity?
Possession of well-defined organs such as eyespots and proboscis
What distinguishes the organ-system grade of organization from the tissue-organ grade?
Organs working together to perform some function
What are the basic body functions associated with organ systems as mentioned in the text?
Circulation, respiration, and digestion
Which animal exhibits the organ-system grade of organization as described in the text?
Nemertean worms with distinct digestive and circulatory systems
Which grade of organization characterizes unicellular organisms?
Protoplasmic
Which organism demonstrates distinct somatic and reproductive cells at the cellular level of organization?
Volvox
Which group is largely of the cellular grade of organization because mast cells are scattered and not organized into tissues?
Cnidaria
An excellent example of a tissue in cnidarians is the __________.
Nerve net
Which grade of organization involves an aggregation of similar cells into definite patterns or layers to perform a common function?
Cell-tissue
Test your knowledge of the levels of biological organization with this quiz. Explore the distinctions between protoplasmic and cellular grades of organization, and understand how different life functions are carried out at each level.
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