RNA rther than DNA D) They do sot evoe in the hind lemb of a lango B chitios ats
ID: 277858 • Letter: R
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RNA rther than DNA D) They do sot evoe in the hind lemb of a lango B chitios ats in the wing of a buberfly hony rays i in the tail fan of a fhying fis D) boees in the flipper of n whale 25. Which of the folowing A) require energy B) use essentially the same genetio eode C) negrodace D) show 26 A) oomposed of RNA, rather than DNiA B)he samthings wn introe hernitable variation C) unrelated genes that eode for the same gone product 27. What must be true of any organ described as watigia? A) It mast be analogous to sme feature in an ancestor D) sonfuncticnal vedigial genes B) It must be homologous to some feabure in an anoestor C) lt must be both homologous and analogoss to some fenture in an ancestor D) In need be neither homologous nor analogous to some Seature in an ancestor 28. Jama, jellies, preserves, honey, and other foods with high sagar content hardly ever become contaminatied by bacteris, even when the food coetainers are left open at room temperature. This is because becteria that enoounter sach an envieoemen A) undergo death as a result of water loss from the oell B) are unable to metabolize the gluoose or fructose, and tous siarve to death C) are obligate anacrobes D) are unibile to swim theoagh these thick and viscous materials 29. Which of the fellowing ohservations about flagellais socurade and is consistent with dhe scikesfhe concdsion that from cukaryotes and bacteria evolved independently? A) The flagella of both eukaryotes and bacteria are mmade of the same protein, but the confipuation is different B) The mechanics of movement and prodein structure are the same in these flagells, but there are sgrificant gemetie difSerences C) Although the sechanism of movesent in both flagella is the sume, the protein that soomglishes D) The proleis stracture and the mechanism of movenest in eukcaryotes lagella are dierent from the prokein that acoomglishes he movement is those of bacteria nagela 30. If a bacterium regenerates from an endoapore that did not poness any of the plasmids that were contained in its original parent cell, the mgenerated bacterium will probably also lack B) a cell wall D) wwer in its cytoplas 31. Termiles eat wood, but many do not prodace enzymes themsclvos that will digest the celulose in the wood Instcad, soene ermites house a complex community of protocoa, bacteria, and archaca that could belp digest the oellulose. Imagine an experimen that fed lemites cither wood only or wood and antbiotics, and then measured the amount of energy extracted trom the wood If both groups gained equal amounts of energy, which of the conclusions is the most logical? A) We would conclude that the protozos coatributed to digestion of cellulose and lignin B) We would conclude that the anchaca contributed to digestion of cellalose and ligiia C) We would conclude that the becteria did not contribute to digestion of cellulose and lgnin D) We would coaclude that none of the three groups were needed to digest cellulose and lignin 32 In a hypothetical situation, the gones for sex pilus construction and for tetracycline resitamce are located on the same plasmid within a particular bacteriam. If this becterium readily perfomms conjugation involving a copy of this plasmid, then the result should be the A) temporary possession by this bacterium of s completely diploid genoeme B) rapid spread of setracycline reaistanoe to other bacteria in that habitat C) subsequent loss of tetracycline resistamoe from this bacteriumD) peoduction of mdospores among the bacterium's progeny 33. Which of the following is least associated with the others? A) borizontal gene transfer D) binary fission B) conjugation 34. Use of synthetic fertilizers often leads to the conlamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution? A) growing improved crop plants that have nitrogen-fixing enzymes B) adding nitrifying bacteria to the soil C) adding denitrifying bacteria to the soil D) using armmonía instead of atrate as a fertilizer 35. Biologists sometimes divide living organisms into two groups: autotrophs and beterotrophs. These two groups differ in A) their sources of carbon B) their electron acceptors C) their mode of inheritance D) the way that they generate ATP 36. If plaque on tecth is actually a biofilm, which of the following characteristics would you expect to find in plaque? A) multiple specics of bacteria, production of chemicals that attract other bacteria, and production of chemicals that allow the bacteria to adhere to ename B) single species of bacteria, production of antibiotics, and mechanisms in the biofilm that allow inner cells to expel wases C) multiple species of bacteria, production of antibiotics, and mechanisms in the biofilm that allow inner cells to expel wasiesExplanation / Answer
24. opion D correct
option A is incorrect, as hindlimb and wings can not be homologus. Wings are homolous with wings forlimbs or flipper.
option B is incorrect, as wings of butterfly and bat perform sae function and have different anatomy in terms of having bone structure and cartelagenous structure in bats and butterflies, respectivetly.Therefore wings of bat is analogus to wings of butterfly.
option C is also incorrect again fish's fin and bats wing has completely different structure and function (nither homologus nor analogus).
option D is correct as whale's flipper has same anatomy as bat's wing, but has different function, there fore these are homologus structures.
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