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What are Homologous Structures in whale evolution? 

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What are Homologous Structures in whale evolution? 

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Homologous Structures are parts that are similar in structure but have different uses in different species. An example of this would be dolphins and whales, they have similar parts such as a blowhole but they use it for different uses.

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What is Ontogeny Recapitulates Phylogeny's in whale evolution? 

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What is Ontogeny Recapitulates Phylogeny's in whale evolution? 

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Ontogeny Recapitulates Phylogeny is when organisms during embruological development go through their evolutionary stages. An example of this would be how whales evolved over time due to natural selection.

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What is Molecular Evolution in whale evolution?

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What is Molecular Evolution in whale evolution?

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Molecular evolution is differences in molecular similarities that can be used to determine degrees of relationship between different species. An example of this in the evolution of whales would be that whales are closely related to ungulates

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What are Vestigial Organs in whale evolution? 

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What are Vestigial Organs in whale evolution? 

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Vestigial Organs are structures in some organisms that seem to have no use in one species but are useful in another species An example of this would be the pelvic bones in Baleen whales.  These are not useful to dolphins but they also have this body structure.

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What is Genetic Drift in whale evolution?

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What is Genetic Drift in whale evolution?

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Genetic Drift is when in each generation, some whales by chance leave behind a few more whales than other individuals. The genes of the whales in the next generation will be the genes of the lucky whales and not the healthier or better individuals.

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Whales are believed to have evolved from creatures that were once able to walk on land. Over time, weather conditions and food sources made whales evolve from land to the water. I chose this topic because I love whales and I wanted to know how they evolved over time.

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In this short animation, produced for primary school children by Green.TV, supported by the Wellcome Trust, we look at the remarkable evolution of the whale from a land-based dog-like animal to the marine mammal that became the world's largest ever creature.

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What is the evolution of whales? (V.I.S.T.)

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What is the evolution of whales? (V.I.S.T.)

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Hippos likely evolved from a group of anthracotheres about 15 million years ago, and the first whales  evolved over 50 million years ago. Hippos are the closest living relatives of whales, but they are not ancestors. It is also believed that whales evolved from creatures that were once able to walk on land as well.

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How did mutation occur in whale evolution?

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How did mutation occur in whale evolution?

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Mutations can be caused by random errors in DNA replication or repair, or by chemical or radiation damage. Mutations can be harmful or neutral. If this happens, it will become more prevalent in the next generation and spread throughout the population. For example, legs started to disappear from whales and their bodies became more streamlined.

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How did migration and gene flow happen in the process of whale evolution? 

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How did migration and gene flow happen in the process of whale evolution? 

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Conditions on land may have forced the whales to spend more time in the water. They also could have had a hard time finding food on land. The water may have offered them a place to cool off and to find food to survive on. Over time, their limbs changed to offer them more control over their movements in the water. As the atmosphere temperatures began to change, evolution took place. During certain times of the year, the water was too cold for the whales to survive because they are warm blooded. Therefore, the patterns of migration evolved.

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The conditions on land may have forced whales to spend more time in the water. Over time, the water offered more than land did. The water offered a place to cool off and provided more food for the whales to have. Over time, whale's appendages changed to offer them more to do. During certain times of the year the water was simply too cold for the whales to survive due to them being warm blooded. Thus, the process of whale evolution began.

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What is an example of Divergent, Parallel, and Convergent evolution in whales?

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What is an example of Divergent, Parallel, and Convergent evolution in whales?

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An example of Divergent Evolution during whale evolution would be the Ambulocetus and Maiacetus stage, they were related species becoming less similar over time.
An example of Parallel Evolution during whale evolution would be the Rodhocetus and Takracetus stage because they came from different species that evolved to be similar due to lifestyle.
An example of Convergent evolution would be a Mesonychids and Cetacea because they are organisms with different ancestors that became more alike.

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What is Sexual Selection in whale evolution? 

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What is Sexual Selection in whale evolution? 

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Sexual Selection is passing on of the genetic information that is influenced by male competition and female choice. This all started when whales limbs began to change due to weather conditions over time.

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How did Natural Selection occur in whales?

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How did Natural Selection occur in whales?

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The transition from early whales from land to water happened in a series of predictable steps. For example, the evolution of the blowhole. Random genetic changes resulted in a least one whale having nostrils placed farther back on its head. Those animals with this adaption would have been better placed in a marine lifestyle. Such animals would have been more successful and had more offspring. In later generations, more genetic changes occured, moving the nose farther back on the head. Other body parts of early whales also changed, front legs disappeared, their bodies became more streamlined, and they developed tail flukes to better propel themselves through water.