Zygospore is

$A$ student observes an alga containing chlorophyll $a$,$d$,and phycoerythrin. To which group should this alga belong?

Which of the following statements is true for algae?

The plant body of Thallophyta is ........

Which statement is correct for $Chlorophyceae$?

Consider the following statements:
$I.$ In red algae,vegetative reproduction takes place by fragmentation.
$II.$ In red algae,the food is stored as floridean starch,which is very similar to amylopectin and glycogen in structure.
$III.$ The cell wall of red algae consists of chitin.
Which of the statements given above are correct?