If you examined a cross section of a woody stem under the microscope and located the vascular cambium, the tissues on the inside of the vascular cambium ring (towards the center of the stem) would be

Question

A.  xylem (primary and secondary).
B.  xylem (only primary).
C.  phloem (primary and secondary).
D.  phloem (only secondary).
E.  phelloderm.

Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?

Gather Content
· What do you already know about the different tissues in a woody stem? How does it relate to the question?

Consider Possibilities
· What other information is related to the question? Which information is most useful?

Choose Answer
· Given what you now know, what information and/or problem solving approach 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?

Answer 1

A.  xylem (primary and secondary).

Clarify Question
· What is the key concept addressed by the question?
        o A cross section of a woody stem is made up of different tissues.
· What type of thinking is required?
        o You must apply what you know about individual tissues of the woody to identify those in the central region of the stem.
· What key words does the question contain and what do they mean?
        o Cross section, which is a section of tissue that is cut perpendicular to the long axis of the organism.
        o Woody stem, which is the trunk of the tree.
        o Vascular cambium, which is the tissue between the xylem and the phloem.

Gather Content
· What do you already know about the different tissues in a woody stem? How does it relate to the question?
        o The vascular cambium lies just inside the bark of a woody stem.
        o Xylem is added to the inside of the vascular cambium.

Consider Possibilities
· What other information is related to the question? Which information is most useful?
        o Phloem is added to the outside of the vascular cambium.

Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
        o To answer this question, you need to focus on the reference to the tissue inside the vascular cambium ring.  If you connect that to the location of xylem on the inside of that ring, you have 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?

· Apply level:
        o This question asked you to asses a section of tissue.  Answering this question correctly depended on your ability to use the characteristics of the tissue in a new situation.  If you got the correct answer, great job! If you got an incorrect answer, where did the process break down? Did you remember that xylem is on the inside of the vascular cambium, or that phloem is on the outside of the vascular cambium? Did you have trouble extending the characteristics
of the plant tissues to determine the correct answer?