What are the economic Importance of Gymnosperms & Angiosperms?

 difference between porifera and protozoa 

classify spirogyra

difference between microsporangia and megasporangia

What is the diffrence between Microsporophyll and Megasporophyll???
 

what is omega taxonomy?

What are coralloid roots??????

 what are the economic importance of amoeba

write a note on economic importance of algae and gymnosperms.

How are pteridophytes different from the phanerogams?

What is Gemma Cups.....??????

what are haplodiplontic type of life cycle...explain it

 What is the life cycle of rhizopus..???