5. Describe two examples of vestigial structures that you can find among the Caminalcules. These are structures that have been reduced to the point that they are virtually useless. Ear muscles and the tail bones are examples of vestigial structures in our own species. Explain how vestigial structures provide clues about a species' evolutionary past. Illustrate your argument with vestigial structures found in humans or other real species.
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- EVOLUTION CONNECTION Evolution in insects and vertebrateshas involved the repeated duplication of body segments, followedby fusion of some segments and specialization of their structureand function. In vertebrates, what anatomical features reflectsegmentation?Insects have three thoracic (trunk) segments. While researchershave found insect fossils with pairs of wings on all threesegments, modern insects have wings or related structureson only the second and third segment. It turns out thatin modern insects, Hox gene products act to inhibit wingformation on the first segment. The treehopper insect (above)is somewhat of an exception. In addition to having wingson its second segment, the treehopper’s first segment has anornate helmet that resembles a set of thorns, which a recentstudy has found to be a modified, fused pair of “wings.” Thethorn-like structure helps to camouflage the treehopper intree branches, thus reducing its risk of predation. Explain howchanges in gene regulation could have led to the evolution ofsuch a structure.Letter drawnby group Mutation if any Result/Trait(s) A AAGGGCUUAUUC Extra long nails on digits B GGCUUAUUC No digits on hands; handspaddle-like C AUGGGCUUAUAC Normal D AUGGGCGGCUUAUAC Hands fused in front ofbody; no range of arm motion E UACAUGGGCUUA Webbing hands and feet F AUGGGCAUAUAC No peripheral vision G AUGGCCUUAUAC Blind H GGGAUAUCG Short legs; correct numberof digits on hands and feet The process of evolution involves changes in the genetic makeup of a population over a period of time. Sexual reproduction enhances variability among offspring. The random alteration of DNA from parent to offspring, called mutations, also produces variable characteristics in offspring. Some mutations can be helpful, while others can be harmful and hinder survival. In this experiment, students mimicked random mutations. The mutations affected the organisms eyesight and appendages. Data was collected by the students to determine if the mutations were helpful or harmful when…
- atlas do not have a centrum? true or false?In 1798, a stuffed platypus specimen was delivered tothe British Museum. Reports that it laid eggs createdmuch confusion. To modern biologists, a platypus isclearly a mammal. It has fur and the females producemilk. Young animals have typical mammalian teeth thatare replaced by hardened pads of the “bill” as the animalmatures. Why do you think modern biologists can moreeasily accept that a mammal can have some reptileliketraits than scientists who were considering this animal inthe late 1700s?Question:- Describe one important anatomical difference between early gnathostome skulls and modern actinopterygian skulls, and explain or speculate as to the functional consequences of that anatomical difference.
- Helping tags: Biology, Vertebrate AnatomyBased on David Attenborough's "Rise of Animals", do new anatomical structures arise de novo? Why or why not? Support your answer by citing at least one example or reference.Pls help me answer the question. WILL UPVOTE, just pls show full explanation and cite at least one example or reference to support your answer. Thanks.The coelom of an earthworm, the muscular foot of a clam, andthe trunk of an elephant can all be considered what type ofskeleton?a. exoskeletonb. hydrostaticc. jointedd. longitudinal1) Of all of the robust australopithecines, I am the most primitive, dated to 2.5 mya. I have an enormous sagittal crest on the top of my head, a back of the skull that looks like A. afarensis, and am quite prognathic. My discovery seemed to justify my removal from the genus Australopithecus, and the creation of an new genus with two other species sharing similar anatomy..................... 2. Why did the scientists in England not believe that Raymond Dart's Taung Child fossil was an early human ancestor? Check all that apply. a) The Piltdown Man fossil was considered a better early human ancestor. b) It had a small brain. c) No other fossils had been found in Africa. d) It was found in caves. e)The Taung Child lacked any human-like traits.
- Terminal unicellular part of ascogonium in Eurotium is known as -----------a)archegoniumb)antheridiumc)trichogyned)oogoniumWouldn't the presence of myomeres in vertebrates be neither symplesiomorphic no synapomorphic when we look at the group alone? Aren't symplesiomorphic and syapomorphic terms used in comparison to the features of other organisms?Amniotes are divided into three groups based on their skull mor-phologies. What are these three groups, and how do their skulls dif-fer? Which living amniotes, if any, originated from each of these three groups?