Question

An immature, eight-inch, reddish-colored pine cone was knocked down from a tree during a recent storm. Which structure or structures does the cone likely contain at this point? Select all that apply.

A) Archegonium

B) Megasporangium

C) Microsporangium

D) Integuments

Answer 1

• Answer - B) Megasporangium and C) Microsporangium
• A female cone takes 3 years to become mature.
• at 1st year it will be 1 cm long , and they prepare themselves for pollination.
• at 2nd year megasporophylls remains as such but they enlarges in size upto some inches
• at 3rd year, they become matured. at separation of megasporophylls happens to produce seeds.
• megasporangiu differentiates to form megaspore mother cell, from which archaegonium is produced- seen in 3rd year.
• male cone- microsporangium attains maturity at 2nd year .
• integumentsare observed in the ovule of megasporangium- so observed in 3rd year.