Four of the following statement about protocells are true. Which statement is false?
a. They are simple membrane-bound sacs.
b. They contain DNA.
c. They are able to engage in metabolism.
d. They are able to reproduce.
e. They are able to capture energy.
ANSWER: b
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a. bryophytes b. seedless vascular plants c. gymnosperms d. angiosperms e. gymnosperms and angiosperms
In the lac operon, the protein that binds to the operator to prevent transcription is
the repressor. RNA polymerase. DNA polymerase. the promoter. lactose.
What does it mean to say that experimental conditions are controlled?
a. The test groups consist of the same individuals. b. The null hypothesis is correct. c. There is no difference in outcome between the control and experimental treatment. d. All physical conditions except for one are identical for all groups tested.
Which common hospital pathogen is able to grow abundantly in soap dishes?
A. Salmonella B. Hemophilus influenzae C. Escherichia coli D. Pseudomonas E. Mycobacteria tuberculosis