STD 11 - 6. Anatomy flowering plants — BIOLOGY STD 11 Science — Question

$(i)$ Growth cannot be taken as a defining property of living organism.
$(ii)$ Dead organism does not grow.
$(iii)$ Reproduction cannot be an all inclusive defining characteristic of living organisms.
$(iv)$ No non-living object is capable of replicating itself.
$(v)$ Metabolism in a test tube is non-living.
$(vi)$ Metabolism is a defining feature of all living organisms.

$I$. They reproduce asexually by non-motile spores and sexually by non-motile gametes

$II$. In this class, sexual reproduction is oogamous and accompanied by complex post-fertilisation developments

$III$. The common members are Polysiphonia, Porphyra, Gracilaria and Gelidium

The above characteristics are belongs to which class of algae