The atomic number of hydrogen is 1. Based on this fact, all of the following must be true of hydrogen gas (H2 ) EXCEPT that it
A) is a stable molecule.
B) shares one pair of electrons between the two hydrogen atoms.
C) is a polar molecule.
D) uses covalent bonds to form the molecule.
C
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During the Southern blot technique, the cut DNA in the gel is ____________________ to single strands to enable a labeled probe to bind to complementary sequences of interest in the fragments
Fill in the blank(s) with correct word
A ________ estuary has sharp boundaries between saltwater and freshwater
a. well-mixed b. partially mixed c. salt wedge d. fjord
The autonomic division of the PNS regulates the activity of which of these? Select all that apply.
A. smooth muscle of the intestinal wall B. cardiac muscle C. smooth muscle of blood vessels D. salivary glands E. skeletal muscles
Researchers in Alaska were interested in increasing the sockeye salmon (Oncorhynchus nerka) population in three coastal lakes. To accomplish this, the ponds were treated with fertilizers. As a result, zooplankton biomass increased between 40% and 700% in the three lakes. The substantial growth in zooplankton would suggest that prior to these experiments, these lakes were ________.
A. eutrophic B. oligotrophic C. subject to low light levels D. stratified