Discuss the difficulties of applying the concept of species to a fossil organism. What will be an ideal response?
A species is a population of similar individuals that in nature interbreed and produce fertile
offspring. However, it is often unclear whether all members of a similar group of fossils were
able to interbreed. Hence, for fossil organisms, morphology has often been used to define
species.
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The source of an atom's electronegativity is the
A. kinetic energy electrons have orbiting the nucleus. B. positively charged atomic nucleus. C. repulsive force occurring between electrons within neighboring shells. D. repulsive force occurring among electrons within the same shell.
During the last ice age about 21,000 years ago, the ice would have taken up a volume equal to what depth of the oceans?
A) 5-10 meters B) 40-55 meters C) 70-82 meters D) 100-120 meters
Sulfuric gases from volcanic eruptions often rise high to become ________
Fill in the blank(s) with the appropriate word(s).
What country contains the highest concentration of endangered animals?
A. Mexico B. United States of America C. Costa Rica D. Trinidad and Tobago E. Tanzania