Children in the Southeastern United States play with red maple fruits (Acer rubrum). The fruits are tossed in the air and spin back to the ground, acting like small helicopters. Which part of the fruit allows for this?  

A.  The pericarp
B.  The integument
C.  The endosperm
D.  The ovule

Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
 
Gather Content
What do you already know about maple fruits? What other information is related to the question?

Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
 
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
 


A.  The pericarp

Clarify Question
What is the key concept addressed by the question?
        · The key concept addressed here is the structure and function of red maple seeds and fruit.
What type of thinking is required?
        · Apply level:
            o You are being asked to take what you already know and use, or apply, it to the anatomy of the fruit of a red maple tree.
 
Gather Content
What do you already know about maple fruits? What other information is related to the question?
        · The ovary wall, or pericarp, consists of three layers; the exocarp, mesocarp, and endocarp.
        · The pericarp gives rise to the fruit.
        · Maples make fruits known as samaras.
        · Samaras form wings from the outer tissues.

Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
        · The integument hardens to produce the seed coat, which immediately surround the embryo. They would not act like helicopter blades.
        · The endosperm is a nutritive layer also surrounds the embryo. It would not extend as wings.
        · The pericarp is tissue that can be modified into various fruit parts, including the blade-like extensions of maple fruits.
 
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
        · Apply level:
            o Answering this question correctly depended on your ability to use maple fruits in a new situation. If you got an incorrect answer, did you remember that pericarp forms fruits, or that can it take on different forms? Did you have trouble extending the characteristics of maple fruit to determine the correct answer?

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