Megasporogenesis and Megagametogenesis — Prelims Questions

Which of the following statements is INCORRECT regarding megasporogenesis and megagametogenesis in a typical angiosperm?

If a plant species has $2n = 24$ chromosomes in its somatic cells, how many chromosomes will be present in the egg cell and the secondary nucleus, respectively, of its embryo sac?

How many nuclei are present in a mature embryo sac before the fusion of polar nuclei, and how many cells are typically present?

Which of the following structures is NOT haploid ($n$) in a typical angiosperm ovule?

The development of the female gametophyte from a single functional megaspore is termed:

During megagametogenesis, the three mitotic divisions are free nuclear. What does 'free nuclear' mean in this context?