Plants use which of the following structures to
allow an exchange of gases?
a. pores
b. plasmodesmata
c. stroma
d. chloroplasts
e. stomata
E
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Your friend examines an ivy vine growing on the side of a campus building and says, “Look – some of the branches on this plant have a different morphology. The leaf shapes and patterning are different, and there are flowers on some branches but not others. There must have been a mutation!” You respond,
A. “I think you’re right. Maybe there was a mutation in the LEAFY (LFY) gene, and the loss of LFY has promoted flowering and had pleiotropic effects on leaf morphology.” B. “No, those branches have just undergone phase change. Now they’re in the adult form, and have become competent to respond to flowering signals.” C. “I think you’re right. Maybe the embryonic flower (emf) gene is being overexpressed, and that’s causing flowers to form.” D. “No, those morphological changes are just evidence that this plant’s environment has changed during its lifetime.” 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 flowers? 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?
Electroreceptors ____
a. are only used by fishes for navigational purposes b. can be used for communication between primates c. are only able to receive, not produce, electrical signals d. can be used to generate electrical fields in some invertebrates having special electric organs e. are usually used in communication, navigation, and hunting in the organisms that possess them
Which of the following dominates in the
process of transcription? a. RNA polymerase b. DNA polymerase c. helicase d. transfer RNA e. all of these dominate in the process of transcription
What does bright red blood indicate?
A) that oxygen is no longer bound to hemoglobin B) that copper is bound to hemoglobin C) that oxygen is bound to hemoglobin D) that carbon monoxide is bound to hemoglobin