In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by__________________?
Correct answer: B. Meiosis
- A. Mitosis
- B. Meiosis
- C. Both depending upon the conditions
- D. None of these
Explanation
The diploid megaspore mother cell in Pinus undergoes meiosis, reducing its chromosome number and producing four haploid megaspores. Mitosis produces genetically similar cells without reducing chromosome number, so students may choose it if they overlook the reduction division.
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About Concept of Evolution
Evolution is the heritable change in populations over generations, driven by mutation, recombination, natural selection, genetic drift and reproductive isolation. Questions examine variation, adaptation, survival and reproduction, speciation, fossil and anatomical evidence, and the difference between individual acclimatization and evolutionary change in a population.
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