In a wind-pollinated species, which of these floral parts is likely to be inconspicuous or absent?
A. pistils
B. stamens
C. stigmas
D. petals
E. receptacle
Answer: D
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The only protists that have two types of nuclei in each cell are the ____
a. Archaeplastida b. dinoflagellates c. ciliates d. Excavates e. amoebozoans
Cells that undergo apoptosis are essential to the organism into adulthood
a. True b. False
Which of the following results from patient testing indicates a bacterial infection?
A. Protein in the blood B. Elevated white blood cell count C. Elevated red blood cell count D. Nitrates in the blood
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.