Plants which are not differentiated into roots,stems,and leaves are:

Consider the following statements regarding the major pigments and stored food in the different groups of algae and choose the correct option:
$(i)$ In Chlorophyceae,the stored food material is starch and the major pigments are chlorophyll $-a$ and $d$.
$(ii)$ In Phaeophyceae,laminarin is the stored food and major pigments are chlorophyll $-a$ and $b$.
$(iii)$ In Rhodophyceae,floridean starch is the stored food and the major pigments are chlorophyll $-a, d$ and phycoerythrin.

Algae attached to stones are called:

$A$ : Thallophytes are non-vascular,non-archegoniate and non-cormophytic plants.
$R$ : Thallophytes lack vascular bundles,archegonia and differentiated plant body.

Assertion : Members of Phaeophyceae vary in colour from olive green to various shades of brown.
Reason : Phaeophyceae possess chlorophyll $a, c$,carotenoids and xanthophylls.

Rhodophyceae is red-coloured due to the presence of: