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These species evolved in similar environments.
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These species have the exact same DNA sequence.
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The embryos of these species require these structures to survive.
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These species share a common ancestor.
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- Vertebrate embryos all follow a very similar developmental process. Which statement could explain this similarity? All vertebrates develop a backbone that protects the spinal cord. All vertebrates live in similar environments which require the same adaptations. All vertebrates inherit the same sequence of DNA from their parents. All vertebrates require the same nutrients during embryological development.Which of the following pieces of evidence would best support the argument that humans are more evolutionarily related to fish than they are to insects? All these organisms require oxygen to survive. The earliest fish fossils are found in the lowest strata of sedimentary rocks, followed by insects, and then humans. The early stages of embryo development in fish and humans look strikingly similar while insects develop very differently compared to both fish and humans. Fossils of ancient fish and human ancestors have been discovered in the same sedimentary rock layers.How can embryos help scientists understand evolution? Embryos go through various stages that suggest the animal’s evolutionary process. Embryos are frequently fossilized and illustrate change over time. Embryos provide evidence for which life forms existed at the same time. Embryos contain the code for all life on Earth.
- Human embryos have tails which become tail bones before birth. Tails also appear in fish, reptiles, amphibians, birds, and mammals Humans also have hair and produce milk to nourish the young, which is unique to mammals. What does this indicate? a close evolutionary connection between humans and many other mammals a very distant evolutionary connection between humans and many other mammals a very distant evolutionary connection between humans and many other reptiles a close evolutionary connection between humans and many other reptilesWhy do penguins, seals, and tuna havesimilar body forms that permit rapid swimming? all share a common ancestor at some point in the past. all of their bodies have been compressed since birth by intensive underwater pressures. flying, pregnancy, and gill-breathing all require similar adaptations in form. the shape is a convergent evolutionary adaptation that reduces drag while swimming. this is the only shape that will allow them to maintain a constant body temperature in water.What conclusion can be drawn from embryological development? Insect and bird wings are similar in function but not in structure. Paleontologists have used fossils to trace the evolution of the modern camel. Many organisms have structures with no apparent function found during embryo development. The presence of gill slits and tails in early vertebrate embryos shows that they may share a common ancestor.
- These are embryos at their most advanced stage, shortly before birth. Fish Salamander Tortoise Chick Rabbit Human Describe how the embryos changed for each of these organisms from their earliest to latest stages. Species Anatomical Changes From Early to Late Stages Human Developed limbs, defined features in face, neck, ears, loss of tail, tiny fingers present Chicken Developed beak, tail shorter, wings and legs developed, head quite large Rabbit Tail gone, developed limbs, detailed features in ears and mouth Tortoise Shell developed, limbs have developed, tail is thinner, large belly, long tail, beak Salamander Has gills, tail and large underbelly Fish fins developed, gills, tail and scales 1. Look again at the six embryos in their earliest stages. Describe the patterns you see. What physicalsimilarities exist between each of the embryos? 2. Does this suggest an evolutionary relationship? Explain how.these embryos can be used as evidence of acommon ancestor between each of these six…Pakicetus 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. Modem 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 concilusion that biologists could draw about the relationship of Aetiocetus to the other organisms is that Aetiocetus O evolved as whale ancestors lost their forward-placed nostrils through disuse. O is the ancestor of both Pakicetus and modern whales. O is not related to either Pakicetus or modern whales. O is a transitional form between Pakicetus and modern whales.On a deep sea expedition, you capture a previously undiscovered sea creature that appears to represent a new phyla. It happens to have fertilized eggs that you get to spawn. You watch its development to determine which group of animals it might belong to. You see that the mouth develops first, and it goes through several larval stages in which it molts and regrows its skeleton. What other traits is it likely to have based on this type of development Radial symmetry Coelem Central Nervous System Two germ layers present yes or no for each
- Most animals show derived characteristics (character states) that differentiate them from their common ancestor (ancestral character state). However, evolution can also move in reverse, involving the change of a derived character state back to an ancestral state. Provide two examples from invertebrates of such ‘reverse evolution’ from a derived state (specialized state) back to a more ancestral character state. Make sure to use examples provided in this class. Provide two examples from invertebrates of such ‘reverse evolution’ from a derived state (specialized state) back to a more ancestral character state. Make sure to use examples provided in this class.Transitional species are species important in helping scientists determine the evolutionary path that species have taken over long periods of time. Lobe-finned fishes are the ancestors of amphibians and have fossils that are found in rocks that are at least 380 million years old. Fossils of the oldest amphibian-like vertebrate animals with true legs and lungs are found in rocks that are approximately 363 million years old. Paleontologists have found a sample of rock that is approximately 370 million years old which contains what seems to be a link between lobe-finned fishes and amphibians. Which of the following is a characteristic that you would not expect to see in this transitional fossil? Question options: Skeletal structures that indicate the development of legs. An intermediate structure between lungs and gills. Teeth that are intermediate to the lobe-finned fishes and amphibians. A neck that is more flexible than lobe-finned fishes.Pakicetus 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...