In a particular layer of rock, a number fossilized ferns are found, but no fossilized mosses are found. What conclusions can be drawn from this finding?
A. The soft tissues of mosses may not have
fossilized as readily as the lignified tissues of
ferns, so it is difficult to draw any conclusions
from this limited sample.
B. Mosses and ferns did not coexist in the
same environment.
C. There are fewer species of moss than
ferns.
D. Ferns evolved earlier than mosses, so it is
not surprising to find a layer with only ferns
and no mosses.
E. Ferns decompose more rapidly than
mosses and thus are more likely to fossilize.
A
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We can accurately determine the age of a rock or fossil by measuring its ____
a. proton concentration b. electron concentration c. neutron concentration d. isotope concentration e. ion concentration
A eusocial animal ______
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