Which of the following has been associated with a form of liver cancer?
A. Human T-cell lymphotropic virus
B. Hepatitis A virus
C. Human papilloma virus
D. Hepatitis B virus
Answer: D
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Which of the diagrams below best depicts the flow of carbon between primary producers, consumers, and decomposers?
A. primary producers consumers decomposers B. consumers primary producers decomposers C. decomposers consumers primary producers
Concerning the sex chromosomes, which of
the following is correct? a. The Y chromosome carries a greater number of genes for nonsexual traits than does the X. b. X and Y are different in size but carry nearly equal numbers of genes. c. The X chromosome carries more genes for nonsexual traits than does the Y. d. The X chromosome carries only genderrelated genes. e. The X chromosome carries the SRY gene
Conserved noncoding sequences (CNGs) are usually sequences involved in what kinds of functions?
What will be an ideal response?
Recall the caterpillar experiment in which caterpillars born in the spring looked like flowers, and caterpillars born in the summer looked like twigs. What is the most likely selective advantage for this difference in body shape?
A) Looking like their food sources allows the caterpillars to move through their environment more efficiently. B) Development into the adult moth form is faster for caterpillars shaped like twigs than like flowers. C) Looking like their food source lets the caterpillars blend into their surroundings, reducing predation. D) Looking like their food source will increase the caterpillars' feeding efficiency; this would increase their growth rate and survival rate.