Which of the following is not a tenant of the Lyon hypothesis?
A) X inactivation occurs early in development.
B) initial X inactivation is random.
C) X inactivation is passed down during mitosis.
D) X inactivation occurs on the maternal X chromosome.
E) X inactivation of descendant cells is the same as the progenitor cell.
Answer: D
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Choose the true statements about MADS box genes.
_____ MADS box genes code for a family of transcription factors. _____ MADS box genes are found only in plants and fungi. _____ MADS box genes establish the body plan in plants. _____ MADS box genes code for a DNA binding motif.
Describe the difference between cohesion and adhesion, and how they, together, allow water to move upward in
plants.
What will be an ideal response?Each turn of the citric acid cycle produces which of the following?
a. One ATP molecule b. Two carbon atoms c. One NADH molecule d. Two ATP molecules
Typhoid fever differs from salmonellosis in that in typhoid fever
A) the microorganisms multiply within macrophages. B) the incubation period is much longer. C) the symptoms are due to infection of the gallbladder. D) infection is spread only in the feces of domesticated animals. E) infection occurs due to ingestion of endospores.