Question

The following question is based on the observation that several dozen different proteins comprise the prokaryotic flagellum and its attachment to the prokaryotic cell, producing a highly complex structure.
Certain proteins of the complex motor that drives bacterial flagella are modified versions of proteins that had previously belonged to plasma membrane pumps. This evidence supports the claim that_____________ (A) natural selection produces organs that will be needed in future environments (B) the motors of bacterial flagella must have originated in other organisms (C) natural selection can produce new structures by coupling together parts of other structures (D) bacteria that possess flagella must have lost the ability to pump certain chemicals across their plasma membranes

Answer 1

Correct option is C. This evidence supports the claim that natural selection can produce new structures by coupling together parts of other structures.

How are gene variants involved in evolution?

Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes. Genetic variations can arise from genetic variations (also called mutations) or from a normal process in which genetic material is rearranged as the cell is about to divide (known as genetic recombination).

Genetic variations that alter gene activity or protein function can introduce different traits into an organism. If a trait is beneficial and helps the individual survive and reproduce, the genetic variation is more likely to be passed on to the next generation (a process known as natural selection).

Over time, as generations of individuals with the trait continue to reproduce, the favorable trait becomes more and more common in a population, making that population different from the ancestral population. Sometimes the population becomes so distinct that it is considered a new species.

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