Formation of a tetraploid plant species from two different diploid parental species of plants is an example of
A. punctuated equilibrium.
B. gradualism.
C. extinction.
D. a postzygotic barrier to evolution.
E. a prezygotic barrier to evolution.
Ans: A. punctuated equilibrium.
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Cnidarians share a common body plan that takes two forms. The free-floating form is called a ____ , whereas the sessile form is called a ____
Fill in the blank with the appropriate word.
The theory of ________ postulates that the number of species on an island represents a dynamic equilibrium between the immigration of new species and the extinction of previously established species
Fill in the blank(s) with correct word
Genetics is the study of ________
A) mutation and recession B) heredity and variation C) diploid and haploid D) replication and recombination E) transcription and translation
The high degree of molecular organization in living cells is:
a) greater in animals than it is in plants. b) attained and maintained as a consequence of the violation of the laws of physics. c) attained and maintained only as long as energy fuels the organization. d) stored as heat energy. e) achieved by the synthesis of carbon dioxide in green plants.