D sedimentary layer = intrusion layer A = boulders 20.) The diagram below repres
ID: 194065 • Letter: D
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D sedimentary layer = intrusion layer A = boulders 20.) The diagram below represents two sedimentary rock layers with one intrusion/dike and a set of boulders. The law of superpositic was used by 19th-centu y geologists to establish the relative ages of the major rock formations of Europe. Keeping that in mind, wher during deposition did the boulders, shown as A, appear in the sequence? A) First B) Second C) Third D) Fourth 21.) Which measurement(s) would help determine absolute dates when measuring 1'C decay? A) the accumulation of the daughter nuclide ("N) B) the loss of the parent nuclide (+C) C) the loss of both parent and daughter nuclides D) Two of the responses above are correct. 22.) The major evolutionary episode corresponding most closely in time with the appearance of animals with skeletons was the A) Cambrian explosion B) Permian extinctions C) Pleistocene ice ages D) Cretaceous extinctions 23.) You discovered an extensive set of dinosaur trackways which would be an example of A) living fossils. B) transitional fossils C) trace fossils. D) index fossils. 24.) There are at least a dozen known species of the extinct genus Lystrosaurus. If each species was suited to a quite different ly the same area and about the same time, then this relatively large number of species could be due to A) polyploidy B) sexual selection C) adaptive radiation D) allopatric speciation Following paragraph applies to questions 25-27 below. A female fly, full of fertilized eggs, is swept by high winds to an island far out to sea. only fly to arrive in this way. Thousands of years later, h She is the first fly to arrive on this island and the er numerous offspring occupy the island, but none of them resembles her es e are, instead, several species, each of which eats only a certain type of organs (halteres) a appearance to their species. Females 25.) If the foods preferred by each species eggs on their food sources, regardless have been driven, at least in part, by food. None of the species can fly and their balancing re now used in courtship displays. The male members of each species bear modified halteres that are unique in bear vestigial halteres. The ranges of all the daughter species overlap. of fly described above are found on different parts of the island, and if the flies mate and lay of the location of the food sources, then the speciation events involving these fly species may A) genetic drift B) habitat differentiation C) autopolyploidy D) allopolyploidy use in courtship displays, and if the species' ranges overlap, then speciation events may have been driven, at least in part, by A) sexual selection B) habitat differentiation C) autopolyploidy D) allopolyploidy 27.) Fly species W, found in a certain part of the island, produces offspring with species X or Z. If no other species can hybridize, then species W and Y fertile offspring with species Y. Species W does not produce fertile hybrid flies. A) have genomes that are still similar enough for successful meiosis (gamete production) to occur in B) have more genetic similarity with each other than either did to the other two species. C) may fuse into a single species if their hybrids remain fertile over the course of many generations. D) All (A, B, C) are possible.Explanation / Answer
22-A
Cambrian Explosion is the refers as sudden appearance in the fossil record of complex animals with mineralized skeletal remains.
23-C
Trace fossils are impression or other sign of activity, for example, feeding, scratching, burrowing, walking, or resting. Many animals, plants, protists, and bacteria have left their traces in the fossil record. These are tubes, lines, scratches, or other sign
24-C
Adaptive radiation is the rapid evolutionary diversification of a single ancestral line. It occurs when members of a single species occupy a variety of distinct niches with a different environmental conditions
25-B
habitat differentiation is subpopulation exploits a habitat, food source, or other resource not used by the parents.
26-A
sexual selection occurs when males compete for territories, when those territories are on traditional mating grounds. Males that manage to acquire the best territories on a mating ground (the dominant males) are known to get more chances to mate with females.
27- A
for any species to survive it needs ability to produce vaible miotic cells and its ability to succesfully fuse with other gamates of same or other species
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