An experimental test of the hypothesis to explain the origin of the first organic compounds on Earth might include all of the following sequential steps except
A. assembling an atmosphere with H2, CH4, NH3, and H2S.
B. placing this atmosphere over liquid water.
C. inoculating with a few bacteria to get the process started.
D. increasing the temperature of the gases.
E. providing energy with electrical spark discharges.
C. inoculating with a few bacteria to get the process started.
You might also like to view...
Answer the following statements true (T) or false (F)
1. During the energy investment phase of glycolysis there is a decrease of free energy that allows later reactions to be exergonic. 2. The ability of bread to rise is mainly a function of the CO2 produced during oxidative phosphorylation rather than that produced from fermentation. 3. The aerobic breakdown of glucose yields 34 to 38 ATP, while the anaerobic breakdown of glucose yields 20 ATP. 4. Secondary metabolites like caffeine are produced mainly from plant sources.
Which process exchanges alleles between homologous chromosomes?
a. mitosis b. genetic recombination c. asexual reproduction d. independent assortment e. anaphase
Which of the following statements about the F2
generation produced in the dihybrid cross is NOT true? a. All offspring with the same phenotype have the same genotype. b. All offspring with the same genotype possess the same phenotype. c. It is not possible to determine the genotype of some individuals by their phenotype. d. It is possible to tell the genotype of some offspring by looking at their phenotypes. e. Nine genotypes and four phenotypes are produced.
A 21-year-old woman presents with a severe headache, body aches, and a fever of 102.8°F. She tells you that she returned from a humanitarian aid mission overseas a week and a half ago and began feeling ill yesterday morning. Given this patient's travel history and clinical presentation, you should expect her to develop:
A) spontaneous hemorrhaging. B) cutaneous lesions on her arms. C) bradycardia and hypersalivation. D) a rash and blisters on her face.