en the continents of the world were fused into one large mass called Pangaea a p
ID: 151603 • Letter: E
Question
en the continents of the world were fused into one large mass called Pangaea a particular group of plants were found across the border of Australia and Antarctica. Evidence of these matching plants within the fossil record on these two separate continents is an example of 9) Wh sympatric speciation, Biogeography cvestigial structures Convergent evolution Which of the ollowing statement describe directional selection? In seed cracker finches from Cameroon, small- and large-billed birds specialize in cracking soft and hard seeds, respectively. A long-term climatic change resulted in all seeds becoming hard, thus favoring the population of large-billed birds. Most Swiss starlings produce four to five eggs in each clutch. Starlings producing fewer, or more, than this have reduced fitness Male salmons with a well-developed kype and female mimics are more successful than male salmons with an under-developed kype in reproducing Mice with an intermediate coat color have been selected, while those with a lighter and darker coat color died. d. An organism has a relatively large number of Hox genes in its genome. Which of the following is true of this organism? These genes are fundamental and are expressed in all cells of the organism. The organism must have multiple paired appendages along the length of its body. The organism has the genetic potential to have a relatively complex anatomy. Most of its Hox genes owe their existence to gene fusion events.Explanation / Answer
9.Asnwer:b.) Biogeography
Explanation:Pangae was the earliest supercontinent, which, according to biogegraphers, onsisted of now known,South America, Africa, India, Antartica and Australia were fused together, which is evident from the presence of imilar and identical species, which occour on the various continents . The example, as stated, is the matching foosils of group of plants on the borde of Antarctica and Australia.
10.Answer:a)
Explanation: Directional Selection is the type of natural selection in whic the extreme trait, favouring the existing condition,thereby increasing the dominance of the trait over time, making it fixed.The long term change in the climate, thus faving the large billed birds, which were recessive, in earlier period.
11.Answer:c)The organism has the genetic potential to have relatively complex anatomy.
Explanation: The Hox gene are large chromosomal assembly, which also exitsed in the ancestors of all the present vertebrates. The Hox genes have now found to be a regulatory mutation which helps in preservation of a single trait while preserving the genes in other processes. These genes have helped in development of complex organisms, over aperiod of time.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.