Which scientists determined that DNA synthesis is semi-conservative?
A. Rosalind Franklin
B. Martha Chase and Frederick Griffith
C. Erwin Chargaff and Oswald Avery
D. James Watson and Francis Crick
E. Matthew Meselson and Franklin Stahl
Answer: E
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Check the phyla that are considered to be lophotrochozoans.
_____ Platyhelminthes. _____ Mollusca. _____ Annelida. _____ Rotifera. _____ Nematoda.
What happens to blood as it moves through the pulmonary circuit? a. Blood is routed to various body locations, allowing food and oxygen to be delivered to the tissues
b. Excess fluids, which were lost through capillary walls, are recollected. c. Carbon dioxide is removed and oxygen is added. d. The blood is examined for the presence of disease organisms.
Male anglerfish often attach to the female so they can
a. utilize the female's increased ability to find prey. b. utilize the female's increased predator avoidance. c. provide sperm to fertilize eggs. d. avoid being eaten by the female. e. obtain growth hormones from her bloodstream.
The semicircular canals are:
a. empty b. filled with gas c. filled with a liquid d. small bones in the ear e. passageways for nerves