You have isolated a gram-positive bacterium with low G + C content. It was a contaminant in unpasteurized milk. It infected a pregnant woman, and now you are worried that her child will be stillborn. What bacterium is it?
a. Anabaena
b. Listeria monocytogenes
c. Clostridium
d. Mycobacterium
Ans: b. Listeria monocytogenes
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Based on genetic comparisons,
a. people of different races often have more genetic similarities than many individuals within a race. b. humans have a more ancient origin than chimpanzees. c. there is much genetic diversity among cheetahs. d. among humans, many genetic variations are restricted to certain racial groups. e. there is no difference between different races of humans.
Paleontologists have pieced together from fossils the evolution of the whale from:a
aquatic reptiles. b. four-legged, land dwelling mammals. c. sharks. d. porpoises. e. extinct aquatic birds.
Blastospores are produced by glomeromycetes
____________________ Indicate whether the statement is true or false.
According to the animation, what does the electron transport chain do to the concentration of hydrogen ions (protons)?
a. The concentration of protons inside the membrane is equal to the concentration outside of the membrane. b. The concentration of protons is higher outside the membrane than inside. c. The concentration of protons is lower outside the membrane than inside.