How pinus differs from mango ?

Write a note on Angiosperms.

Wolfia is an example of....

How many organisms in the list given below show autrophic nutrition method ?

Lactobacillus, Nostoc, Chara, wolffia, Nistrosomonas, Nitrobacter, porphyra Streptococus, Saccharomyces, Trypanosoma,

Angiospermic plants are characterised by

$I.$ double fertilisation $II.$ triploid endosperm $III.$ Diploid endosperm

Choose the correct option from the following regarding above statements

Both gymnosperms and angiosperms bear seeds, then why are they classified separately?