Question

5. A paper published this year concluded that the giant Chinese paddlefish should be declared officially extinct. (15 pts) a. We often agree on the year an old species goes extinct, but we rarely agree on the year new species arises. Why? b. Why might we expect mass extinctions to be followed by adaptive radiations? c. Much of our evidence for mass extinctions come from shelled, near-shore organisms. Give two reasons for this. Reason 1: Reason 2: d. Suppose one population splits into two genetically isolated populations, but selection does NOT act differently in them. Will the two populations genetically diverge? Circle one, and explain. yes no depends

Answer 1

Answer: Page 1 * According to given A paper published this year concluded that the giant... the a) there are measure he and a ୦୪ can be many ways to see extinction of a species at particulas time and place due to tool available today but unfortunately, there are limited approach to time of an organism species arises soughly idea drawn there by most of People genedally have argue on the origin of species => Most of oe search suggest that majority of chinese Paddlefish disappeared (extinct) Complete in 2003 although it is still considered extinct rather that CR. b), Both event is greatly related , when mass, extinction happened due to food, of climatic new

Page 2 change or any other reason and large number of species wiped out, which eventually deads to adaptive radiation, =) The habitat become (niche) become empty when mass extinction occurs in a species which lure the other species of organism to occupy the empty room for their survival and it would be the part of evolution and diversity among animals. c) the reason behind such mass extinction is: ;) dimatic change such as Sevede Volcanic eruption of impact on the planate at a particular are due to asteroid. ii) Another significant reason is over- consumption, as for last few decades, people have developed more Palatability sea food and over hunting may cause

of a Page 3 mass extinction species. other reason could be deduction reduction in Poolifer- ation and pollution etc., d) Yes, they would be genetically diverse natural selection even though no observed due to gene pool in the Population and environment. X Please give me thumb's up.