Darwin's theory of natural selection is based on
A. Over production
B. Struggle for existence and variation
C. Survival of the fittest
D. All of the above
Answer: Option D
This Question Belongs to Biology GK Chapter Wise >> Cell Biology
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The plasma membrane is covered by a cell wall in cells of
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B. Bacteria
C. Fungi and Algae
D. All of the above
A. Robert Brown
B. Schleiden
C. Theodore Schwann
D. Rudolf Virchow
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