Ovules in $Pinus$ are generally

  • A
    Anatropous with four integuments
  • B
    Anatropous with one integument
  • C
    Amphitropous with three integuments
  • D
    Orthotropous with two integuments

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$A$ : Endosperm in $Cycas$ is haploid in nature.
$R$ : $Cycas$ roots show association with oxyphotobacteria.

Which of the following is not applicable to the sporophytic phase of Cycas?

If the pollen grain of $Pinus$ contains $6$ chromosomes,then how many chromosomes will its endosperm have?

Cycas is

In $Cycas$,specialized roots are associated with nitrogen-fixing cyanobacteria. These roots are called .....

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