The development of tracheids helped land plants to

Question

A.  resist desiccation.
B.  protect the genome from UV exposure.
C.  grow to very large sizes.
D.  absorb H2O from stems and leaves.
E.  take in more CO2.


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 tracheids? 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?

Answer 1

C.  grow to very large sizes.

Clarify Question
What is the key concept addressed by the question?
        · This question is asking you to apply the benefits of tracheids to land plant adaptations.
What type of thinking is required?
        · You are being asked to take what you already know and use, or apply, it to the advantages conferred by tracheids.
 
Gather Content
What do you already know about tracheids? What other information is related to the question?
        · Tracheids are the first known components of vascular tissues.
        · Vascular tissues are used to move water and other nutrients efficiently within a plant.
        · Water and nutrients are necessary for a plant to maintain its structure and metabolic activities.
 
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
        · Although they move materials including water within a plant, tracheids do not prevent desiccation, nor are they protective against UV exposure.
        · Tracheids deliver water to leaves and stems rather than absorbing it from same.
        · Tracheids are passages for delivery of materials; they do not take in CO2.
        · Since tracheids increase the efficiency of water and nutrient circulation, they make large sizes possible for plants.
 
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?
        · Answering this question correctly depended on your ability to use tracheids in a new situation. If you got an incorrect answer, did you remember that tracheids are components of vascular tissue, or that vascular tissue is used to efficiently transport water and nutrients? Did you have trouble extending tracheids to determine the correct answer?