Which of the following techniques was used to produce Dolly, the first mammal to be cloned?
a. trangenic modification
b. transformation
c. enucleation
d. fermentation
c. enucleation
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Why are most infants with phenylketonuria usually healthy at birth?
a. The defect causing the condition has usually been repaired by that time. b. The mother breaks down phenylalanine for both herself and her fetus. c. The infant can produce sufficient quantities of the enzymes needed by birth. d. Phenylalanine can be completely excreted in infants. e. Phenylalanine is completely metabolized in infants
Use the following information to answer the question(s) below. Big Bend National Park in Texas is mostly Chihuahuan desert, where rainfall averages about 10 inches per year. Yet, it is not uncommon when hiking in this bone-dry desert to encounter mosses and ferns. One such plant is called "flower of stone." It is not a flowering plant, nor does it produce seeds. Under arid conditions, its leaflike structures curl up. However, when it rains, it unfurls its leaves, which form a bright green rosette on the desert floor. Consequently, it is sometimes called the "resurrection plant." At first glance, it could be a fern, a true moss, or a spike moss. What feature of both true mosses and ferns makes it most surprising that they can survive for many generations in dry deserts?
A. flagellated sperm B. lack of vascular tissues C. lack of cuticle D. lack of true roots E. a gametophyte generation that is dominant
This is the major cause of type 2 diabetes
A) heart disease B) being underweight C) insulin resistance D) viral infection
A growth medium that favors the growth of some microorganisms but inhibits the growth of other microorganisms is a ________ medium.
A. neither selective nor differential B. selective and differential C. selective D. differential