Ionizing radiation that can harm living cells does so by ____
a. creating chemical compounds
b. lysing lysosomes
c. removing electrons from atoms to create positive ions
d. creating buffers
e. destroying buffers
ANSWER: c
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When young male white-crowned sparrows first begin to sing, they match their vocal output to ____
a. any birdsong they hear during their initial days of singing b. an instinctive blueprint of their species' song c. the memory of their species' song heard months earlier d. the memory of whatever song they heard during an early critical period e. the songs of male relatives heard during their initial days of singing
What key feature of chimpanzee tool use have anthropologists identified?
What will be an ideal response?
Nanoarchaeum equitans is a parasite of which of the following organisms?
a. Homo sapiens b. Escherichia coli c. Ignicoccus hospitalis d. Saccharomyces cerevisiae
The basic shape of a DNA molecule is the _____.
A) base pair B) sugar-phosphate backbone C) single helix D) double helix