Indicate, as true or false, whether each of the following statements about speci
ID: 79923 • Letter: I
Question
Indicate, as true or false, whether each of the following statements about species is a component of the biological species concept. Their reproductive isolation from each other is complete. false They are unable to produce hybrid offspring upon interbreeding. true They shared a common ancestor recently in evolutionary time. false For each description of reproductive isolation, select the option that best describes it. Many aquatic animals release sperm and eggs into the water. Sperm and egg of different species do not fertilize each other because of a lack of recognition of molecules on the surface of the gamete cells. A group of small arboreal primates are divided into several species based on distinctly shaped genitalia that only fits genitalia of its own species. Two species of crickets are morphologically identical, but females only respond to mating songs of males of their own species. The wood and leopard frogs live in overlapping ranges, the wood frog has peak mating activity in mid-March, the leopard frog has peak mating activity in mid-April. For each situation, indicate the type of speciation described. The speciation of North American lacewings is believed to have been driven by predation, two variations of coloring were protected against predators while heterozygotes were eliminated quickly. In plants, new species may arise quickly due to multiplication of the entire complement of chromosomes. Rabbits on one island have a colder climate then rabbits on another island. Over time, the two populations of rabbits become separate species. Nine species of treehoppers (plant-feeding insects) are believed to have diversified as a consequence of changes in plant hosts used for food. A population of lizards is able to cross a small stream, but when the climate changes and the stream becomes a wide river, the lizards on each side of the river diverge into different species.Explanation / Answer
6. True it considers potentially reproductive individuals which are isolated completely
False because biological species concept considers interbreeding isolated populations which is why it failed to explain the hybrids. Hybrids are outcomes of potential mating with different breeds.
True because of the above reasons.
7. The meachnical isolation fits the best. It proposes that the inability of the sperm to bind to egg due to structural or molecualr blockage for zygote formation and even if the zygote is formed it is found that development is abnormal and the zygote is hence aborted. This prevents majority of the reproductive fusion betwen two species.
therefore, the option that best describes is the first statement.
8. a. sympatric speciation
b. polyploidy
c. allopatric speciation (geographical isolation)
d. adaptive speciation
e. adaptive speciation also called sympatric speciation