The female sex organ in red algae is flask-shaped and is known as

The stored food in Polysiphonia is:

Consider the following statements regarding reproduction in class-$Chlorophyceae$.
$I.$ Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.
$II.$ The sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous,anisogamous and oogamous.
Which of the statements given above are correct?

Identify the algae shown in the given figure.

The body structure of green algae may be

Kelp (branched form) and Sargassum (filamentous form) belong to: