If a repressor protein attaches to the operator, RNA polymerase cannot proceed to transcribe key enzymes needed by the organism. This can be seen in the trp operon in E .coli bacteria.
Lamarck called his theory, the theory of Acquired Characteristics. Lamarck's Theory of Inheritance of Acquired Characteristics has been disproved. This was done in two major ways. The first is by experiment. We have seen through many real examples and observations that changes that occur in an animal during life are not passed on to the animal's offspring.
A Convex Lens is the type of lens used in magnifying glasses.
B.Prokaryotic cells do not have a true nucleus or membrane-bound organelles.
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