The characteristics of Thallophyta are .........

The change in the color of algae based on the depth of the sea is known as .........

The basal cell of $Ulothrix$ is:

Which of the following is correct for the given figure?

In which of the following plants is the sporophytic generation represented only by the zygote?

Which of the following statements are applicable to brown algae?
$(I)$ They contain pigments like chlorophyll $a$,chlorophyll $c$,carotenoids,and xanthophylls.
$(II)$ They vary in color from olive green to various shades of brown.
$(III)$ Food is stored as complex carbohydrates,in the form of laminarin or mannitol.
$(IV)$ The cell wall is composed of cellulose and algin.
$(V)$ The cell wall is covered on the outside by a gelatinous coating of algin.