Assertion (A) : In perennial plant species, it is difficult to demarcate vegetative, reproductive and senescent phases.
Reason (R) : Perennial plants have very short lifespan.
Perennial plants have a long lifespan. Hence, it becomes very difficult to define or demarcate and study their vegetative, reproductive and senescent phases.
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Sexual reproduction involves formation of male and female gametes by
a. same individual
b. different individual of opposite sex
c. different individual of different species
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