A defect of spinal development that results when tissues fail to close properly around the spinal cord during the first trimester of pregnancy is called ________.
Fill in the blank(s) with the appropriate word(s).
spina bifida
Spina bifida is a defect that results when tissues fail to close properly around the spinal cord during the first trimester of pregnancy.
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As a person ages, the papilla grow less dense and the skin becomes __________
a. tighter b. looser c. thicker d. thinner
A black colony on HE and XLD agars, isolated from a stool culture, produces the following biochemical reactions:
Motility at 25°C: positive PAD: no color change Motility at 35°C: positive Indole: no color change Urea: no color change VP: no color change If this organism is a strict pathogen, you expect it to also be A) citrate negative and lysine negative. B) citrate negative and lysine positive. C) citrate positive and lysine negative. D) citrate positive and lysine positive.