On the average, how much weight should a healthy woman gain during pregnancy?
a. 10 to 15 pounds
b. 15 to 25 pounds
c. 20 to 35 pounds
d. 25 to 40 pounds
e. 30 to 50 pounds
C
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Thalidomide, an anticonvulsive and antihistamine medication, was shown to cause severely deformed limbs in children whose mothers took the medication. What might thalidomide do during development?
A. Cause a defect in the fertilization of an egg. B. Severely alter blastulation in the embryo. C. Impair morphogenetic fields within the embryo. D. Impair neural tube formation. E. Block cell division during blastulation.
______ cells are made during mitosis, but _______ cells are made during meiosis.
a. Somatic; diploid b. Haploid; gamete c. Somatic; haploid d. Haploid; diploid
In medicine, agriculture, and conservation applications of biotechnology, the common genetic unit used is the
A. allele. B. gene. C. centromere. D. nucleotide (nitrogen base). E. chromatid.
In the presence of both lactose and glucose, which of the following occurs with the E. coli lac operon?
A. The lacI gene does not produce repressor. B. The lacZ and lacY genes are fully expressed. C. The cAMP-CAP complex is not available to bind near or at the lac promoter. D. Lactose is converted to glucose and galactose. E. Lactose binds to the operator.