Pick a specific animal that exists today and research its ancestor from millions of years ago. How has this animal evolved? Compare it to the ancestor and explain why certain changes may have taken place.
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Animal Diversity
Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.
Platyhelminthes
Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
Pick a specific animal that exists today and research its ancestor from millions of years ago. How has this animal evolved? Compare it to the ancestor and explain why certain changes may have taken place.
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- Give an example of an animal that has evolved through time such as birds, insects and others. How has this certain animal evolved? You may draw the evolution or simply explain. Thanks so much!A biologist is trying to infer how five closely related species of snakes are related to one another. She notices that some of the snakes have forked tongues and others do not. Which of the following would help her distinguish the ancestral state? Group of answer choices She looks at a representative mammal species to see if it has a forked tongue. She locates a specimen of a more closely related snake to see if it has forked tongue. She looks among snakes fossils for evidence that being forked is a characteristic of the ancestor of this group, but determines no such fossil exist. She flips a coin.You have the chance to use the very first time-machine created by humans. You volunteer to travel 520 million years back in time to collect coastal marine animals. The first organism you encounter is unusual looking and does not resemble any extant organism you know. You notice that the body is segmented, and the segments are not identical. You also notice that the organism has well developed eyes and one pair of long antennae. Their jointed appendages are branched but unequal in size and have various shapes. Moreover, the body appears to be rigid and covered dorsally with numerous spines. Try to classify this organism (e.g., its phylum) based on its appearance and describe its symmetry. Then speculate on its ecology, likely life history (reproduction), and key developmental features. The second organism that you encounter is fixed to the substrate, firm, and has fan shape with finger like projections. It is brightly colored. As you observe it, a few branches of the fan break off. You…
- Using various resources such as your school Library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal, say horse.Pick two organisms from the cladogram below and make a claim about the evolutionary relationship between these organisms. Support your claim using evidence from the lesson and scientific reasoning about evolutionary relationships. Ray-finned fish Rodents Sharks Amphibians Primates & rabbits Crocodiles Birds Hair Eggs with shell Amniotic egg Four limbs Bony skeleton Vertebrae Image Source a relationship betwwen a shark and bird is a bony skeleton amitotic egg and four limbsThrough _______, a body part of an ancestor is modified differently in different lines of descent. a. homologous evolution c. adaptive divergence b. morphological convergence d. morphological divergence
- A new organism has been discovered! Our fictional creature, “the Snipe”, has structural similarities to a deer, pig, and beaver. It has a pig’s head with antlers, and big buck-teeth, a deer’s body, and a wide, flat tail. Please describe how you could determine its place on the evolutionary tree below. Please draw an evolutionary tree to demonstratePakicetus is an ancient wolf-like organism that lived 50 million year ago. It had wolf-like ears and nostrils on the front of its skull. Modern whales have a similar ear structure, but their nostrils are on the back of their skull. Aetiocetus lived 25 million years ago, had the same ear structure as both Pakicetus and modern whales, but nostrils in the middle of its skull. According to this information, the most likely conclusion that biologists could draw about the relationship of Aetiocetus to the other organisms is that Aetiocetus...How do fossils provide evidence that evolution has happened on Earth? a. Fossils show that some species have gone extinct. b. Fossils show how life forms present today are different than those from the past. Fossils show how the sizes of certain animals has changed drastically over millions of с. years. d. Different sedimentary rock layers provide evidence for how the environment has changed over time.