In gymnosperms, the embryo is formed after the fertilization needs nutrition. The nutrition in the gymnosperms is provided by the female gametophyte cells as these cells degrade to provide the nutrients. Since the female gametophyte is haploid in nature, therefore, is the correct answer.
The seed is formed after the fertilization has occurred therefore is considered the diploid structure. The outer structure which helps in the dispersal of the cell thus is considered the diploid structure.
The connective tissues of mammalian brain is called the meninges. There are three layers of this tissue. The outer layer is called the dura mater. The arachnoid is the middle layer and the pia mater is the inner layer of it.
