A human X-linked disorder is
a. found only in males.
b. more frequently expressed in females.
c. found on the Y chromosome.
d. transmitted from father to son.
e. more frequently expressed in males.
ANSWER: e
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Which of the following is not related to the five fundamental characteristics of life?
A) A bacterial cell divides to produce two cells B) Sugars are transported on carrier proteins into cells across the plasma membrane C) Sugars are broken down inside cells to produce energy D) The gene that specifies skin color in frogs is expressed during its development from a tad pole into an adult frog E) Giraffes have longer necks so that they can reach food sources unavailable to other animals
A tumor is actively producing both VEGF and FGF, factors that stimulate angiogenesis, but no new network of blood vessels to the tumor has been established in spite of the fact that blood vessels are nearby. This observation suggests that most likely
A) the cancer cell versions of the VEGF and FGF are not functional. B) only VEGF or EGF is active but not both. C) p53 is overexpressed. D) angiostatin is present in greater concentration. E) the tumor has been established by metastasis of a cell from a distant tumor.
Which of the following is the pattern of spacing for individuals within the boundaries of the population?
A) cohort B) dispersion C) Allee effect D) iteroparous E) semelparous
One of the waste products that accumulates during cellular functions is carbon dioxide. It is removed via the respiratory system
What is another waste product that accumulates during normal physiological functions in vertebrates? I) ammonia II) uric acid III) urea A) only I and III B) only II and III C) only I and II D) I, II, and III