The botanical name of the sea palm is:

Which of the following algae is a blue-green alga?

Match the following columns:

Column-$I$	Column-$II$
$P$. Unicellular	$I$. Volvox
$Q$. Colonial	$II$. Chlamydomonas
$R$. Filamentous	$III$. Ulothrix and Spirogyra
$S$. Massive plant body	$IV$. Kelp

$Ulothrix$ produces

Which statement is correct for $Chlorophyceae$?

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?