If the methylene blue strip inside an anaerobe jar was blue, which of the following organisms could possibly grow on plates in the jar?
A) All of the organisms used in this lab
B) Pseudomonas aeruginosa and Staphylococcus aureus, but not Clostridium sporogenes
C) Clostridium sporogenes and Pseudomonas aeruginosa, but not Staphylococcus aureus
D) Staphylococcus aureus and Clostridium sporogenes, but not Pseudomonas aeruginosa
B) Pseudomonas aeruginosa and Staphylococcus aureus, but not Clostridium sporogenes
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Study of the origin of life has resulted in the breakdown of cellular development into overlapping stages, beginning with the synthesis of precursor molecules for the synthesis of nucleotides and amino acids and ending in polymers enclosed in membranes acquiring cellular properties. Which of these stages were a focus of study for Miller and Urey in their FIRST experiment?
A. Stage 1: Nucleotides and amino acids were produced prior to the existence of cells. B. Stage 2: Nucleotides became polymerized to form RNA and/or DNA, and amino acids became polymerized to form proteins. C. Stage 3: Polymers became enclosed in membranes. D. Stage 4: Polymers enclosed in membranes acquired cellular properties. E. Stage 5: Ribosomes were developed inside the membrane.
Water moves upward in a tree due to
a. the cohesive nature of water. b. pressure flow. c. transpiration. d. the cohesive nature of water and transpiration
All of the following have exoskeletons EXCEPT
a. lobsters. b. spiders. c. insects. d. earthworms. e. centipedes.
A community
A. includes all populations of all species in a given area. B. features the living organisms interacting with the physical and chemical environment. C. is the sum of all places in Earth's atmosphere, crust, and waters where organisms live. D. includes members of only one species. E. is at a higher level of organization than an ecosystem.