Which of the following CANNOT be made by using recombinant DNA technology?
a. Vaccines
b. Human hormones
c. Pharmaceutical drugs
d. Life
e. Pest-resistant crops
Ans: d. Life
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The tuft of fenestrated capillaries at which filtration takes place in the mammalian kidney is referred to as the
A. glomerulus. B. Bowman's capsule. C. renal corpuscle. D. proximal convoluted tubule. E. collecting duct.
An unfortunate deer becomes stuck in quicksand at the edge of a lake and dies. A few months later, it is buried by sediment in a massive landslide, but by this time, bacteria have fully decomposed its soft tissues. Several million years later, archeologists are digging at the spot where the deer dies and was buried. Would the archeologists be able to find a fossil of the deer? Why or why not?
A. No, because it needed to be fully intact when buried to form a fossil. B. Yes, because its skeleton could have been replaced by minerals to form a fossil. C. No, because bacteria continued to decompose its skeleton after it was buried. D. Yes, because it would have fossilized before it was buried.
The umbilical cord of a mammal connects the
A) amnion and the chorion. B) maternal and fetal bloodstreams. C) yolk sac and the allantois. D) fetus and the placenta. E) embryo and the amnion.
A comparison of mitochondria and chloroplasts shows that
A. both use an increase in pH in their inner-membrane space to produce ATP. B. they have very different electron transport protein complexes. C. both generate ATP via an H+ electrochemical gradient. D. only mitochondria contain ATP synthase. E. both use oxygen as a final electron acceptor.