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Levels of Biological Organization Quiz

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Questions and Answers

Which of the following best describes the tissue-organ grade of organization?

A collection of organs working together to perform various functions

Tissues organized into a system to perform a specific function

An aggregation of tissues that form organs with more specialized functions (correct)

A single type of tissue forming an organ with a basic function

What is a characteristic feature of flatworms in terms of organizational complexity?

Development of an intricate organ system

Presence of a single type of tissue forming all organs

Organization of tissues into a complex network

Possession of well-defined organs such as eyespots and proboscis (correct)

What distinguishes the organ-system grade of organization from the tissue-organ grade?

An aggregation of tissues forming specific organs

Tissues organizing into organ systems with specialized functions

Organs working together to perform some function (correct)

A single organ performing a specific function

What are the basic body functions associated with organ systems as mentioned in the text?

Circulation, respiration, and digestion (D) Signup and view all the answers

Which animal exhibits the organ-system grade of organization as described in the text?

Nemertean worms with distinct digestive and circulatory systems (D) Signup and view all the answers

Which grade of organization characterizes unicellular organisms?

Protoplasmic (C) Signup and view all the answers

Which organism demonstrates distinct somatic and reproductive cells at the cellular level of organization?

Volvox (C) Signup and view all the answers

Which group is largely of the cellular grade of organization because mast cells are scattered and not organized into tissues?

Cnidaria (D) Signup and view all the answers

An excellent example of a tissue in cnidarians is the __________.

Nerve net (B) Signup and view all the answers

Which grade of organization involves an aggregation of similar cells into definite patterns or layers to perform a common function?

Cell-tissue (B) Signup and view all the answers