9) Which piece of evidence supports the hypothesis shown in the \"Within the art
ID: 268778 • Letter: 9
Question
9) Which piece of evidence supports the hypothesis shown in the "Within the artiodactyls" origin of the whale lineage, suggesting that the whale lineage diverged from the lineage leading to the hippos after the other members of the order Artiodactyla (pigs, camels, etc.) diverged? A) Whales arose from a terrestrial ancestor about 50 million years ago. B) DNA comparisons show that whales and hippos share more genetic sequences than whales share with other artiodactyls. C) All artiodactyls other than whales share an unusual ankle bone called the astragalus D) A phylogeny of fossil cetaceans indicates that a gradual transition occurred between terrestrial forms and aquatic, whale-like forms. E) Some modern cetaceans have a vestigial pelvic girdle. 10) Given a population that contains genetic variation, what is the correct sequence of the following events under the influence of natural selection? 1. Well-adapted individuals leave more offspring than do poorly-adapted individuals. 2. A change occurs in the environment 3. Genetic frequencies within the population change. 4. Poorly-adapted individuals have decreased survivorship. A)4-2-1-3 B)4-1-2-3 C)4-2?3-01 cave-dwelling organisms have lost their eyes. Tapeworms have lost their 11) Over long periods of time, many digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses? A) Natural selection cannot account for losses but accounts only for new structures and functions. organisms experienced harmful mutations that forced them to lose these B) The ancestors of these tinde prticular circumstances that persisted for long periods, each of these structures presented greater costs than benefits. D) Natural selection accounts for these losses by the principle of use and disuse.Explanation / Answer
9) DNA comparisons show that whales and hippos share more genetic sequences than whales share with other artiodactyls
Evidence show Hippos and whales and evolved from same ancestor hence share common genotypes but whales are not evolved from hippos.
10) 2-->4-->1-->3
A natural selection occurs in the environment which results in the removal of all animals with unfit gens or defective genes for the at particular environment and phenotypes which are able to live in the change environment survives and grows in large numbers
11) Under particular circumstances that persisted for long periods, each of these structures presented greater cost than benefits
Under natural selection nature selects the best organs required for the particular environment and the organs which cost more than benefit is removed in the course e of evolution.
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