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Ch. 22 - Evolution by Natural Selection

Chapter 21, Problem 5

Explain the logic behind the claim that the nuclear envelope is a synapomorphy that defines eukaryotes as a monophyletic group.

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Hello everyone here. We have a question asking blank. Is a shared and derived character that is common between an ancestor in its defendants. We have a polymorphism. Polymorphism is the genetic variation that is not in a continued state. So A. Is incorrect. The synapse morph synaptic morphy is shared and derived character that is common between ancestor and its descendants. So our answer is B. Seneca morph. But let's look at our other two options. We have C. Polyandry, polyandry is a pattern of mating in which a female animal has more than one made. So C. Is incorrect and we have D. Apostrophe. A park therapy is the condition in which the female reproductive organs of the flower are not joined to each other so it isn't the, so our answer here is be snap morph. Thank you for watching. Bye.
Related Practice
Textbook Question

Traits that are derived from a common ancestor, like the bones of human arms and bird wings, are said to be               .

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Textbook Question

How can evolutionary fitness be measured? Select True or False for each statement. T/F Document how long individuals survive. T/F Count the number of healthy, fertile offspring produced. T/F Determine which individuals are strongest. T/F Determine which phenotype is the most common.

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Textbook Question

According to data presented in this chapter, which of the following are correct? Select True or False for each statement. T/F When individuals change in response to challenges from the environment, their altered traits are passed on to offspring. T/F Species are created independently of each other and do not change over time. T/F Populations—not individuals—change when natural selection occurs. T/F The traits of populations become more perfect over time.

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Textbook Question

Some biologists summarize evolution by natural selection with the phrase 'mutation proposes, selection disposes.' Mutation is a process that creates heritable variation. Explain what the phrase means.

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Textbook Question

Why don't the biggest and strongest individuals in a population always produce the most offspring? a. The biggest and strongest individuals always have higher fitness. b. In some environments, being big and strong lowers fitness. c. Sometimes the biggest and strongest individuals may choose to have fewer offspring. d. Sometimes the number of offspring is not related to fitness.

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Textbook Question

Evaluate this statement: Evolution is said to occur when new traits accumulate over time, increasing complexity.

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