Why does vascular cambium produce annual rings in xylem but not in phloem? What will be an ideal response?
ANSWER: Secondary xylem is produced within the vascular cambium, and new layers of xylem are
deposited around the old layers. As a result, the older layers of xylem are not damaged.
Secondary phloem is deposited outside the vascular cambium. As the tree gets larger in
diameter, the secondary phloem is crushed, stretched and continually replaced. As a result
older layers are not visible.
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The equation for cellular respiration is: C6H12O6 + 6O2 6CO2 + 6H2O. At what specific point in the cellular respiration process has glucose been broken down completely from a six carbon molecule to 6 molecules of CO2?
A. During the priming reactions in glycolysis B. During the oxidation and ATP formation reactions in glycolysis C. During pyruvate oxidation D. During the condensation reaction in the Krebs cycle E. During the second oxidation in the Krebs cycle 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 cellular respiration and the oxidation of carbon? What other information is related to the question? Choose Answer Do you have all the information needed to determine at which point glucose is completely oxidized to carbon dioxide? 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?
An organism that causes infection as a result of a dog or cat bite was tested for catalase, resulting in a positive reaction. What could be the possible source of the error?
a. The catalase reagent could be expired. b. This organism is normally negative for catalase; therefore a mutation may have occurred. c. A false-positive result occurred because of the catalase production of the red blood cells in the 5% sheep blood agar. d. No error is present. This organism is cata-lase-positive.
What is the general term for double-membrane organelles that function in photosynthesis, storage, or pigmentation in plant and algal cells?
a. chloroplasts b. chromoplasts c. amyloplasts d. plastids e. chlorophylls
The ____ is the colored portion of the eye
Fill in the blank(s) with the appropriate word(s).