Biology, 03.11.2019 02:31 antionette1
Naturalist jean-baptiste lamarck promoted the theory of “inheritance of acquired characteristics “. this theory stated that changes developed over the course of the life of an organism would be transmitted to the next generation. a famous example involves a blacksmith. working with heavy hammers, pounding iron all day, blacksmiths developed larger arms than average men, this trait, large and muscular arms, would then be passed down to the children of the blacksmith.
charles darwin developed a competing theory based on variation and a process her called “natural selection” his theory stressed how the differences among the individuals in a population would lead to different rates of survival and reproduction. through this process, in conjunction with what he called a “strong principle of inheritance” entire populations could adapt, and ultimately, evolve. dna and it structure was not isolated and understood until the mid 1900s. it serves as
a. an example of how the blacksmiths arms grow as large as they do
b. the mechanism by which the inheritance of acquired characteristics operates
c. the mechanism through which population evolution operates
d. the mechanism by which the strong principle of inheritance operates.
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Biology, 21.06.2019 20:30
How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?
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Biology, 22.06.2019 16:30
You will create a molecular clock model for an arthropod gene. follow these guidelines to make your model: . your timeline will span from 90 million years ago to the present. the common ancestor in your model is an arthropod that lived 90 million years ago. the gene that you'll track codes for a protein in the species venom . the dna sequence youll track contains 10 nitrogen bases. you can choose the order of the bases and where the mutations occur. this gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. to build your model,/ calculate the estimated time period it takes for 1 base pair to mutate. the first time period will only show the common ancestor. at the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences. the first and third descendant species will survive for the rest of the timeline. the second descendant species was extinct 50 million years ago. calculate how long it will take for one full base pair mutation to occur. explain your reasoning by constructing a mathematical equation
Answers: 2
Naturalist jean-baptiste lamarck promoted the theory of “inheritance of acquired characteristics “....
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