If a woman in her late forties wants to have a baby and seeks medical advice, she will be advised that she is at greater risk of having a baby with Down syndrome.
a. true
b. false
a. true
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The geologist who, in 1830, renewed the idea of uniformitarianism by showing gradual changes in some organisms that were found in successive fossil layers was
A. Georges-Louis Buffon. B. Charles Darwin. C. James Hutton. D. Jean Lamarck. E. Charles Lyell.
Members of a population have similar
a. phenotypes. b. morphological traits. c. physiological traits. d. behavioral traits. e. all of these
Since the membrane is more permeable to K+ than to Na+,
Select one: a. there are always more positive ions outside the membrane than inside. b. there are always more negative ions outside the membrane than inside. c. the outside of the membrane is always negative. d. the outside of the membrane is always neutral. e. there really is never a resting potential. Feedback
Brain-heart infusion, trypticase soy agar (TSA), and nutrient agar are all examples of which type of media?
A. synthetic B. enriched C. reducing D. complex E. selective