The procedure by which embryos produced during in vitro fertilization are tested for defects is called
a. chorionic villus sampling.
b. preimplantation diagnosis.
c. amniocentesis.
d. fetoscopy.
e. senescence.
B
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The autoclave treatment may be monitored by
A. heat-sensitive tape. B. heat-resistant endospores of Geobacillus stearothermophilus. C. pressure indicators alone. D. waiting for contaminants to appear on freshly poured media. E. heat-sensitive tape AND heat-resistant endospores ofGeobacillus stearothermophilus.
Saprobes are ________
a. fungi, animals, prokaryotes, or protists b. all of the choices c. chemoheterotrophs d. decomposers
What mechanism is one that prevents fertilization due to reproductive times?
a. Behavioral isolation b. Anatomical isolation c. Habitat isolation d. Temporal isolation
Bush beans grow as small bushes rather than as vines because their internodes are short and they branch close to the apical meristem. Which substance, if applied to a bush bean, might cause it to elongate its internodes and grow as a vine?
A) a cytokinin B) a gibberellin C) abscisic acid (ABA) D) ethylene