For most atoms, when does the configuration of electrons make the atom unreactive?
a. when the atom has moved all of its electrons to its outermost shell
b. When the atom has as many protons as neutrons
c. When the atom achieves a zero net charge
d. When the atom as 8 electrons in its outermost shell
Ans: d. When the atom as 8 electrons in its outermost shell
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After being bitten by an infected tick, transfer of the rickettsial organism occurs
A. immediately. B. within 5 minutes. C. within 20 minutes. D. within 4-10 hours
A common characteristic of Choanoflagellida is
A. a single, unique mitochondria. B. space beneath the plasma membrane. C. silica covering. D. funnel-shaped, contractile collar. E. presence of a plasmodium.
Which structures found in ferns are lacking in
mosses?
a. spores b. gametophytes c. xylem d. sporophytes e. flagellated sperm
During the Krebs cycle, ____
a. substrate-level phosphorylation occurs b. oxaloacetate is consumed c. electrons and H+ are removed from the coenzymes NADH and FADH d. molecules of carbon dioxide are consumed e. oxidative phosphorylation occurs