Stem of Psilophyton an example of psilogsida is differentiated into an underground rhizome and an aerial part both of which are _________ branched
Correct answer: B. Dichotomously
- A. Isotomous
- B. Dichotomously
- C. Trichotomously
- D. Multichotomously
Explanation
Psilophyton has an underground rhizome and an aerial axis that repeatedly divides into two equal branches, a pattern called dichotomous branching. Isotomous describes equal branching more precisely, so students may choose it, but the standard classification term asked for here is dichotomous.
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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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