From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in
Mosses
Pteridophytes
Gymnosperms
Liverworts
Consider following features
(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics
Annelida, Arthropoda and Mollusca
Arthropoda, Mollusca and Chordata
Annelida, Mollusca and Chordata
Annelida, Arthropoda and Chordata
Which of the following is non symbiotic bio-fertilizer
YAM
Anabaena
Azotobacter
Rhizobium
C.
Azotobacter
Anabaena, Nostoc, Aulosira etc., are agriculturally very important as non-symbiotic bacteria also called free living nitrogen fixing bacteria. VAM, Azotobacter and Rhizobium are symbiotic organisms.