The milk of goats has been genetically modified to produce human antithrombin, a protein with anticoagulant properties. How did the recombinant plasmid containing the human antithrombin gene get into the goats?
A. The goats ingested bacterial pellets containing the recombinant plasmid, the DNA then integrated into their cells.
B. The recombinant plasmid was injected into mammary cells.
C. The recombinant plasmid was put into a goat oocyte, which was in turn fertilized and implanted into a surrogate goat mother.
D. The recombinant plasmid was put into a viral vector; the virus then infected the goat cells.
E. The goat cells were treated with chemical agents such as calcium chloride, which made them competent to take up DNA.
C. The recombinant plasmid was put into a goat oocyte, which was in turn fertilized and implanted into a surrogate goat mother.
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Jacques Cousteau is best known for helping to perfect which marine technology
A. Sonar B. Remote sensing C. Scuba diving equipment D. Remotely operated vehicles (ROVs)
In a typical predator-prey relationship, ____
a. the predator exerts selective pressure on its prey b. the prey exerts selective pressure on its predator c. the predator will not kill its prey d. the predator feeds on carcasses e. predator and prey exert selective pressures on each other
Which is NOT ordinarily capable of being reduced at
any time? a. NAD+ b. FAD c. oxygen, O2 d. water e. all of these
Which lineage of Cnidarians exist primarily as cube-shaped medusae, are active swimmers, and produce one of the deadliest toxins made by animals?
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