Question

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13) Why are fossils considered to be an incomplete record of evolution A) The fossil record shows changes in kinds of organism that lived on earth B) The fossil record shows that many animals are extinct The fossil record is based for organisms that had hands and D) Fossils document how new organisms come from pre g o 14) What is true of the fossil record of mammalang ? A) It indicates that mammals and dinosaurs did not overlap in google time B) It includes transitional forms with progressively specialized teeth It shows that mammals and birds evolved from the same kind of dinosaur D) It includes a series that shows the gradual change of scales into fur 15) Endosymbiosis is an evolutionary theory that explains the origin of eukaryotes and suggests specific order in which is met havered. Anstalls ruled and the best use the metabolic processes of the smaller cells. Based on shared-core processes and features, which statement most accurately describes the order the theory, and the evolutionary implications for all organisms within domain Eukarya? A) As Earth was becoming more aerobic, mitochondria would have provided an advantage to host cells by converting tonic oxygen into energy for heterotrophic cells. Since mitochondria are found in all eukaryotes, these combinations likely evolved first Photosynthetic eukaryotes probably acquired an autotrophic prokaryote, which developed an advantageous symbiotic relationship with the host cell B) All ancestral eukaryotes would have most likely consumed a nucleus-like prokaryote that eventually became the eukaryotic nucleus. These r eukaryotic cells would have had an advantage over prokaryotic cells by acquiring a nuclear command center for regulating cellular activities C) As carbon dioxide levels were increasing over time, natural selection would have favored organisms that acquired a photosynthetic prokaryote to convert carbon dioxide into sugars. These would have likely been the first eukaryotic cells. These ancestral cells engulfed mitochondria-like prokaryotes, which would have provided an even greater advantage for cells in this environment. D) Ancestral heterotrophic eukaryotes most likely engulfed both a heterotrophic and an autotrophic prokaryote, whereas ancestral photosynthetic eukaryotes probably provided the host cell for the first mitochondria. Over time, natural selection favored these relationships, and these cells became ancestors of all eukaryotes. 16) The term condergent evolution is most applicable to which of the following features? A) the legless condition found in various lineages of extant lizards B) the fur that covers Australian moles and North American moles C) the five-digit condition of human hands and bat wings D) the bones of bat forelimbs and the bones of bird forelimbs 17) 17) How was early Earth from more than three billion years ago different from today's Earth? Unlike Earth today, early Earth A) had an atmosphere rich in gases released from volcanic eruptions B) had an oxidizing atmosphere C) experienced little high-energy radiation from the sun D) had an atmosphere with significant quantities of ozone

Answer 1

13) Fossils are biased for organisms that had hard shells and skeletons. Because fossils takes period to form and by then their are chances that the animals have already decomposed by then.