Question

21. How many of the following are heterosporous
plants without seed formation ?
Pinus, Selaginella, Salvia, Salvinia, Azolla,
Cycas, Eucalyptus, Equisetum, Dryopteris,
Ginkgo :-
(1) 5 (2) 3 (3) 7 (4) 6
c
.​

Answer 1

Answer:

2 (3)

Explanation:

there are only 9 genera pteridophytes show heterogeneous i.e Selaginella , isoestes, stylites ,. marsilea , pilularia , regenellidum , saluinia , azolla , and platyzona