i According to evolutionary theory, organisms with very similar phenotypes: a. a

Question

i According to evolutionary theory, organisms with very similar phenotypes: a. are always very closely related b. always have very similar genotypes c. will evolve under very similar conditions. d. have very different genotypes. e both c and d are correct 2 Which of the following is NOT supported by scientific evidence a. Probability Theory b. Evolutionary Theory c. Genetic Theory Cell Theory e. all of the above ARE scientific theories supported by large amounts of evidence 3. At the beginning of western settlement millions of buffalo lived on the Great Plains. By 1890 only about 750 survived in the entire country. This is an example of a. a severe mutation b. negative gene flow c. the founder effect d. a genetic bottleneck. 4. Livestock production in the U.S. today uses nearly 3 times as many antibiotics as are prescribed for all human patients. It is most likely that routine use of antibiotics in animal feed will result in: a. an effective, long term way to eliminate disease- causing bacteria in the animals and therefore increase food production. b. the animals developing resistance to the antibiotics. c. an increased number of antibiotic-resistant bacterial strains. d. the elimination of viral infections and thus increased food production. e. ever fewer disease-causing bacteria in the environment.

Explanation / Answer

1 option d because evolutionary theory deals with how life changed after its origin.acoording darwin natural selection evolutionary changes comes about through abundant production of genetic variation in every generation.The relatively few individuals who survive ,owing to aparticularly well adapted combination of inheritable characters,give rise to the next generation 2 option e because probality means the chance that an event occur in the future is called event proabilty supported by mendel in probaablity of obtaining a tall plany by applying multiplicativelaw and additive law of probabity,cell theory has been supported by schwann ,scheledien and virchow who concluded that cells arise from preexisting cells.evolution theory based on darwinism supported by natural selectioni,e industrial melanism,sexual selection etc genetic thory was based on medelian laws of inheritance later on suppoted by devries , morgan, bateson ,3;option d genetic bottleneck meanss apopulation bottle neck is an evolutionary event when a population drastically decreases to a small size over a short period of time the bottle neck caused by environmental disaster , the hunting of a species to the point of extinction or habitat destruction that results in the death of organisms 4 option c antibotic also called antibacterials a type of antimicrobial drug used in the treatment and prevention of bacterial infections which either killor inhibit the growth of bacteria.they posses antiprotozal activity and their misuse allows the emergence of resistant organisms.they are not efffective against viruses.Due to indiscriminate use of antibiotics in animal husbandry in US led to emerge of antibiotic resistant bacterial strains was put forward by US FOOD AND DRUG ADMINISTRATION [FDA] in 1977.

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