Chlorophyll $e$ is generally present in:

Algae are important; we should study algae because

Which of the following organisms cannot fix nitrogen?
$A.$ Azotobacter
$B.$ Oscillatoria
$C.$ Anabaena
$D.$ Volvox
$E.$ Nostoc
Choose the correct answer from the options given below:

The method of asexual reproduction in algae is -

Which one of the following is wrong about $Chara$?

The smallest plant group that contains green pigments similar to higher green plants is: