Which among the following are incorrect about Gymnosperms?

Artificial classification of plant kingdom is based on ___

The color in Phaecophyceae depends on the amount of xanthophyll and fucoxanthin.

Haploid cells undergo mitosis and diploid cells undergo meiosis to form plant body.

During unfavourable conditions, the outer layer that is formed in chlamydomonas is called as __

Bryophytes are erect with hair like structures called as ____

The covering outside an ovule in Gymnosperms is called as ______

Which among the following are incorrect about natural classification?