Calcium levels are primarily under the control of
a. calcitonin and thyroxine.
b. parathyroid hormone and calcitonin.
c. prolactin and oxytocin.
d. parathyroid hormone and thyroxine.
e. progesterone and ADH.
B
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Which of the following processes occurs in the cytoplasm of a eukaryotic cell?
a. translation b. DNA replication and transcription c. transcription d. DNA replication e. translation and transcription
Tetrad analysis shows that crossing-over occurs at the four-strand stage (i.e., after replication) because, when two genes are linked,
A) NPD > T. B) T > NPD. C) T > PD. D) PD > NPD. E) PD > T.
In warm areas, salt is extracted from seawater by:
a. evaporation. b. freezing. c. reverse osmosis. d. chemical methods. e. filtration.
In a cross between a true-breeding plant bearing the dominant traits of smooth, yellow seeds and a true-breeding plant
bearing the recessive traits of wrinkled, green seeds, the offspring (F1) are all smooth and yellow and their genotype is ____. a. SSYY b. ssyy c. SsYy d. ssYY e. SSyy