A female missing an X chromosome (XO) has Turner syndrome.
a. true
b. false
a. true
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What is the standard deviation for the mother's and daughter's heights?
A. Mothers: 6.07Daughters: 4.6 B. Mothers: 5.07Daughters: 4.6 C. Mothers: 6.07 Daughters: 5.6 D. Mothers: 4.07 Daughters: 4.6
The observations of Hooke and van Leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory?
a. the germ theory of disease and causative agents b. the theory of spontaneous generation, which held that life forms could arise spontaneously c. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organisms d. the cell theory, stating that all living things are composed of cells
The lac operator site within the lac operon is an example of a
A. trans-acting element. B. contra-acting element. C. para-acting element. D. cis-acting element. E. inter-acting element.
Which of the following describes the mechanism of action for zidovudine?
A. It prevents the viral DNA from integrating in the host chromosome. B. It inhibits the assembly of HIV particles. C. It is a thymine analog that interferes with the synthesis of DNA from the HIV RNA template. D. It inhibits fusion of the viral envelope and host cell envelope. E. It directly binds to reverse transcriptase and prevents reverse transcription of HIV RNA.