What major event occurs during the first stage of labor?
A) The fetal head crowns. B) The cervix thins and dilates.
C) The placenta is delivered. D) The newborn is delivered.
Answer: B
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The process that actively transports specific substances from the blood into the kidney tubules to become part of the urine is
A. tubular reabsorption. B. tubular secretion. C. glomerular filtration.
Cerebrospinal fluid passes into the blood by way of the
A) arachnoid granulations. B) cerebral aqueduct. C) lateral ventricles. D) choroid plexus. E) brachial plexus.
What is the type of ossification that forms the flat bones of the skull?
A. Endochondral ossification B. Intramembranous ossification
Of the different sources of genetic variability which one causes the variation in the combinations of homologs from paternal and maternal linage found within a haploid cell?
A) independent assortment B) crossing over C) random fertilization D) mutation