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Question

Who proposed the tunica-corpus theory?

A
Hanstein
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B
Nageli
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C
Hofmeister
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D
Schmidt
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Solution

The correct option is B Schmidt
The tunica-corpus theory was proposed by a German scientist A. Schmidt in 1924. The theory includes that the shoot apex can be differentiated into two major regions corpus and tunica. Corpus is a central core, with large cells dividing irregularly to result in volume growth. It is surrounded by an outer enveloping layer the tunica. The tunica may be single or multilayered. It
Thus, option D is correct.

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