pls help me not bio just basic science An evolutionary biologist is studying the relationship between fish species. Shestudies undisturbed sedimentary rock layers at the bottom of the Atlantic Ocean. Sheobserves that the fossils found in the bottom layer have a great degree of similarity tothe fossils found in the top layer. Which statement best explains what the similaritybetween the two layers suggests about evolution?5AFossils in the bottom layer were formed before those in the top layer.BFossils are only found in sediments.CLife evolved slowly from earlier forms of life.Fossils in the bottom layer are more complex than those in the top layer. 4 Species with great genetic diversity have an increased chance of survival.Advantageous variations within a species allow the species to be more competetiveand live longer in the wild. Which of the following is a source of genetic variationwithin a species?Aenvironmental factorsBnatural selectionlearned traitsDinherited traits

Evolution is defined as the gradual changes in the features and characteristics of organisms and…

4 Species with great genetic diversity have an increased chance of survival. Advantageous variations within a species allow the species to be more competetive and live longer in the wild. Which of the following is a source of genetic variation within a species? A environmental factors B natural selection learned traits D inherited traits

4 Species with great genetic diversity have an increased chance of survival. Advantageous variations within a species allow the species to be more competetive and live longer in the wild. Which of the following is a source of genetic variation within a species? A environmental factors B natural selection learned traits D inherited traits

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter11: Evidence Of Evolution

Section: Chapter Questions

Problem 1CT

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Similar questions

. The upper forelimbs of humans and bats have fairly similarskeletal structures, whereas the corresponding bones inwhales have very different shapes and proportions. However,genetic data suggest that all three kinds of organisms divergedfrom a common ancestor at about the same time. Which ofthe following is the most likely explanation for these data?(A) Forelimb evolution was adaptive in people and bats, butnot in whales.(B) Natural selection in an aquatic environment resulted insignificant changes to whale forelimb anatomy.(C) Genes mutate faster in whales than in humans or bats.(D) Whales are not properly classified as mammals.
Imagine that you have the DNA sequences fromthe intron of a gene in three species called A, B,and C. Species A and B are most closely related,while C is more distantly related. The sequencesof A and B differ by 18 base pairs, A and C differby 26 base pairs, and B and C differ by 28 basepairs. Fossils show that species A and B divergedabout 1.2 Mya, but there is no fossil evidence asto when the most recent common ancestor ofall three species lived. Use the genetic data toestimate that date. What assumptions are youmaking to get this estimate?
House sparrows (Maya) were introduced to North America in 1852. Since that time thesparrows have evolved different characteristics in different locations. Sparrow populations inthe north are larger-bodied than sparrow populations in the south. This divergence inpopulations is probably at least partly a result of natural selection: larger-bodied birds canoften survive lower temperatures than smaller-bodied birds can. Colder weather in the northmay select for larger-bodied birds. What type of evolution based on natural selectionaccounts for this observation? Explain your answer.
Jellyfish Lake, located on the Pacific island of Palau, is home tomillions of jellyfish. Many years ago, sea levels dropped and thejellyfish were trapped in the basin. The lake contains no predators,and the jellyfish’s sting has weakened. Jellyfish Lake is now a populartourist attraction where snorkelers can swim among the jellyfish.Explain how Jellyfish Lake is evidence for evolution
The fossil record does not give us a complete picture of the history oflife becausea. not all past organisms have become fossilized.b. only organisms with hard skeletons can become fossilized.c. fossils of very small organisms have not been found.d. fossils of early organisms are located too deep in the crust of theEarth to be found.e. All of the above are true.
The theory of evolution is supported by a large body of evidence. What is the first occurrence of found in geologic strata?
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Aardvarks, anteaters, and pangolins are only distantly related but are similar in structure and form as a result of (a) homology (b) convergent evolution (c) biogeography (d) vestigial structures (e) artificial selection
A great adaptive radiation of animals that occurred during the _______ gave rise to modern animal lineages. a. Precambrian c. Cambrian b. Ediacaran d. Jurassic
During the Precambrian, _______. a. atmospheric oxygen concentration declined b. bacteria, archaea, and early eukaryotes arose c. dinosaurs became extinct d. all of the above
EVOLUTION CONNECTION Darwin suggested looking at aspecies’ close relatives to learn what its ancestors may havebeen like. Explain how his suggestion anticipates recentmethods, such as phylogenetic bracketing and the use ofoutgroups in cladistic analysis.
The diversity of modern vertebrates was shaped in partby mass extinctions. The most severe extinction eventwe know of occured at the border between the Permianand Triassic periods about 250 million years ago. Anestimated 96 percent of the marine species and 70 percentof land species disappeared in what is sometimes called“The Great Dying.” The cause of this mass extinctionremains under investigation. Suggested causes includean asteroid impact, extreme volcanic activity, or a sudden release of carbon dioxide from deposits on the sea floor. Which groups of vertebrates were present when this mass extinction event occurred? Which evolvedafterward?