Question

Which of the following represent examples of reproductive isolating mechanisms? More than one answer may be correct.

Which of the following represent examples of reproductive isolating mechanisms? More than one answer may be correct The spontaneous doubling of chromosome numbers that prevented a newly formed allopolyploid from backcrossing with its diploid parental sepecies The construction of the Great Wall of China which prevented pollinators from carrying pollen from one side to the other. - The establishment of a small colony population of California tarweed on the Hawalian Islands that was no longer in reproductive contact with the parental population in California. Non-overlap in flowering times within the ancestral population that gave rise to Silene virginica and Silene rotundifolia The warming and drying of the American West coupled with the increase in sea levels that separated the mesic forests of eastern North America and eastern Asia.

Answer 1

Answer. The construction of the Great wall of China which prevents pollinators from carrying pollens from one side to the other is a mechanical reproductive isolation mechanism.

Non- overlap in flowering times within the ancestral population that give rise to Silene virginica and Silence rotundifolia.