What is the advantage of having cyanobacteria living inside a cell?
A. Enhanced protection of DNA
B. Intracellular production of glucose
C. Much more efficient protein synthesis
D. Allows the cell to manufacture ATP
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 endosymbiosis?
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
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?
B. Intracellular production of glucose
Clarify Question
· What is the key concept addressed by the question?
o This question addresses endosymbiosis.
· What type of thinking is required?
o This question is asking you to take what you already know and apply it to this unfamiliar situation.
Gather Content
· What do you already know about endosymbiosis?
o Photosynthetic eukaryotic cells possess chloroplasts, the energy-harvesting organelles.
o Mitochondria and chloroplasts are both believed to have entered early eukaryotic cells by a process called endosymbiosis.
o Chloroplasts are derived from cyanobacteria. The red and green algae acquired their chloroplasts by directly incorporating a cyanobacterium. The brown algae most likely incorporated red algae to obtain chloroplasts
Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
o Cyanobacteria are photosynthetic bacteria. In the process of endosymbiosis, a cell hosts cyanobacteria. The cyanobacteria benefit the cell by producing glucose via photosynthesis.
o Those intracellular cyanobacteria eventually become chloroplasts.
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?
o The question required you to take what you already know and apply it to this unfamiliar situation.
o Did you recognize that intracellular cyanobacteria, the progenitors of chloroplasts, benefited cells by providing glucose from photosynthesis?
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Which of the following statements about Hfr cells and bacterial conjugation is false?
A. An Hfr cell becomes an F- cell if its integrated F plasmid is excised. B. If excision of the F plasmid from an Hfr cell includes some bacterial genes, a partial diploid can result. C. The genes that are transferred from an Hfr cell into a recipient cell during conjugation replace the equivalent genes in the recipient cell. D. An F' plasmid contains some bacterial genes. E. Cells with integrated F' plasmid have two copies of some genes.
The letter B" in the above figure represents its
a. shell. b. mantle. c. gills. d. siphon. e. none of these
You see an advertisement on the television with a very good looking person showing off a new, shiny, powerful car
You seriously think about buying that particular car. Therefore, the person in the advertisement could best be described asthe:a. sign stimulus. b. operant conditioner. c. imprinter. d. classic conditioner. e. negative reinforcer
A species colonizes an island, goes through a phase of exponential growth, and reaches the carrying capacity of the island. At what stage is the growth rate slowest?
A. exponential phase B. after reaching K C. approaching K D. initial colonization