. Several new tetraploid species of plant known as the salsifies have arisen in
ID: 199020 • Letter: #
Question
. Several new tetraploid species of plant known as the salsifies have arisen in western new species arose from diploid species that went through the process of allopolyploidy. This m mode of speciation and it occurs is known as A. adaptive radiation; very slowly B. allopatric speciation; almost instantancously C. sympatric speciation; very slowly D. allopatric speciation; very slowly E, sympatric speciation; almost instantaneously 26. Punctuated equilibrium proposed by Eldredge and Gould in 1972 is an evolutionary process A. "spurts" of change observable in the fossil record followed by periods of stasis. B. gradual change observable in the fossil record followed by periods of stasis. C. gradual change observable in the fossil record followed by periods of no change at all. D. "spurts" of change observable in the fossil record with very little if any stasis. E. gradual change observable in the fossil record with very little, if any, stasis. 27. Which isolating mechanism is postzygotic? A. behavioral isolation B. hybrid sterility C. temporal isolation D. mechanical isolation E. ecological isolation 28. According to the Biological Species Concept, two groups of organisms that are unable to form fertile, viable hybrids are considered to be different A. hybrids. B. races. C. cohabitants. D. kingdoms. E. species 29. The type of speciation that results in the formation of separate species as a result of geographic isolation is speciation. called A. adaptive B. sexual C. allopatric D. sympatric E. gradual 30. Once species have formed, they keep their identity by A. developmental differences. B. genetic blocks. C. somatic mutations D. structural modifications. E. isolating mechanisms.Explanation / Answer
Question 25.
Answer. (B)
Question 26.
Answer. (A)
Question 27.
Answer. (B)
Question 28.
Answer. (E)
Question 29.
Answer. (C)
Question 30.
Answer. (E)
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