Hepaticophytes lack stomata and tracheids. What would provide evidence to justify their inclusion in the Bryophytes and not the Charophytes?
A. Cellulose in their cell walls
B. Genes for ABA signalling
C. The use of chlorophyll
D. A haplodiplontic lifecycle
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 hepaticophytes? 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?
B. Genes for ABA signalling
Clarify Question
What is the key concept addressed by the question?
· This question is asking about the factor that would differentiate a hepaticophyte from a bryophyte.
What type of thinking is required?
· You are being asked to take what you already know and use, or apply, it to the characteristics of hepaticophytes.
Gather Content
What do you already know about hepaticophytes? What other information is related to the question?
· Charophytes are green algae that live in fresh water.
· Hepaticophytes are commonly known as liverworts.
· Liverworts are part of a larger group known as bryophytes.
· Bryophytes lack vascular tissue, but can exist on land in various environments.
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
· The presence of cellulose in the cell wall, the use of chloroplasts, and the haplodiplontic life cycle are features that are common to charophytes and hepaticophytes, so these feature would not allow differentiation.
· ABA (abscisic acid) signaling is found in plants that must tolerate temperature and other stresses associated with life on land. Since liverworts exist on land and charophytes do not, this would be a key factor in their differentiation.
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 apply the characteristics of hepaticophytes in a new situation. If you got an incorrect answer, did you remember that hepaticophytes are vascular, land plants, or that ABA signaling aids the stresses that are encountered by land plants? Did you have trouble extending hepaticophytes to determine the correct answer?
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