The centrosome is associated with which class of cytoskeletal filaments?
A. microfilaments
B. intermediate filaments
C. microtubules
D. Answers a and b are correct.
C
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Which of the following statements is false regarding amphibolic pathways?
A. Glyceraldehyde-3-phosphate is used as a precursor for amino acid, lipid, and carbohydrate synthesis. B. Glucose is broken down in glycolysis; however, not all of the intermediates in the pathway are utilized as an energy source. Many leave the pathway to serve as precursors for complex molecules. C. Metabolic pathways are amphibolic, that is, catabolism and anabolism are intertwined in order to conserve energy in the cell. D. All organisms use metabolic pathways to synthesize the 20 amino acids necessary for protein synthesis using precursors from catabolic processes. E. Glucose is broken down during glycolysis to pyruvate; however, when glucose is in short supply, pyruvate is used as a precursor in the process of gluconeogenesis.
Which of the following is not one of the main functions of a vascular bundle? a. Conduct water
b. Transport ions within the plant body. c. Conduct nutrients to the rest of the plant body. d. Support upright stems. e. Conduct photosynthesis.
Before Darwin published his work, Lamarck and others had suggested mechanisms for evolution. By what means did Darwin propose species evolved over time?
A. Overproduction of young B. Natural selection C. Survival of the strongest D. Passing on acquired traits
The evolutionary relationships between the eukaryotic supergroups are depicted in the diagram.Diatoms share a more recent common ancestor with dinoflagellates than with water molds.
Answer the following statement true (T) or false (F)