Amniocentesis and chorionic villus sampling allow for ________ and ________ of the fetus so that it can be tested for abnormalities
A) imaging; karyotyping
B) sexing; imaging
C) karyotyping; biochemical testing
D) direct observation; biochemical testing
Answer: C
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In Gram-stained preparations, M. atlantae will appear as:
a. either gram-negative coccobacilli or short, broad rods that tend to resist decoloriza-tion and may appear gram-variable. b. gram-negative cocci in pairs or short chains. c. coccobacilli or medium-sized rods. d. coccobacilli that may appear in chains.
Histoplasmosis ________
a. is a lung disease caused by Histoplasma capsulatum b. causes apple scab c. is a brown rot of peaches, destroying them before they reach market d. taints rye, causing vomiting, diarrhea, and hallucinations in people who eat it
One of the conclusions drawn from Darwin's theory of evolution is that:a
existing organisms can adapt to environmental changes b. living organisms are composed of basic units called cells c. living organisms contain substances produced by cells d. genetic information can pass from organism to organism by means of DNA e. organisms living today descended with modifications from previously existing forms
Oxygen is not a greenhouse gas; therefore, gases containing oxygen—such as ozone, nitrous oxide, and carbon dioxide—are not greenhouse gases either. Which of the following is a valid response to this statement?
a. False. Oxygen is a special case because of its reactivity and electronegativity. b. True. Compounds display emergent properties that are very similar to those of the elements that form them. c. True. It is impossible for a gas containing oxygen to be a greenhouse gas. d. True. Because oxygen is not a greenhouse gas, it is unlikely to combine with anything at a higher level of organization to form a greenhouse gas. e. False. Compounds can have emergent properties that are very different from those of the elements that form them.