Which of the following are considered fossils?
A) Footprints or other impressions preserved in stone
B) Mineralized bones
C) Animals frozen in ice or preserved in amber
D) All of these
D
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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 correct concerning F factors?
A. It may integrate into the host chromosome B. It stands for fertility factor C. It allows conjugation to occur D. F+ bacteria act as donor strains in conjugation E. All of the answers are correct
The bending of light rays as they pass from one medium to another is called refraction.
Answer the following statement true (T) or false (F)
Do any of the dinosaurs appear to be omnivores?
a. Yes b. No